KR101020266B1 - Method for controlling sound volume considering individual auditory capacity characteristic and speaker transmission characteristic and apparatus for controlling sound volume using this - Google Patents

Abstract

The present invention relates to a method for adjusting the sound volume in consideration of the individual hearing characteristics and speaker transmission characteristics, and a sound volume adjusting device using the same, which reduces the damage of hearing by the sound device, the voice and the acoustic communication device including the portable and the sound intelligibility In order to increase the reproducibility, a single frequency sound is reproduced to measure individual minimum audible threshold characteristics, and the loudness is adjusted based on the measured minimum audible threshold characteristics. To this end, the present invention comprises the steps of setting a standard minimum audible limit sound as the first reference sound (S10); Determining whether the first reference sound is a minimum audible sound by allowing an individual to listen to the first reference sound (S20); If the first reference sound is not the minimum audible sound of the individual, measuring the minimum audible sound of the individual (S30); Determining the minimum audible sound of the individual as the second reference sound (S40); Adjusting the loudness based on the second reference sound (S50); Compensating for the sound output through the speaker according to the transmission characteristic of the speaker (S60); Outputting the compensated sound through the speaker (S70); It is characterized by comprising a device using such a method, to provide a clear sound according to the hearing damage reduction effect and the individual hearing characteristics of the sound device, voice and acoustic communication device, including portable, loud.

Hearing, speaker, smoothing, compensation, audible limits

Description

TECHNICAL CONTROL CONTROLLING SOUND VOLUME CONSIDERING INDIVIDUAL AUDITORY CAPACITY CHARACTERISTIC AND SPEAKER TRANSMISSION CHARACTERISTIC AND APPARATUS FOR CONTROLLING SOUND VOLUME USING THIS

The present invention relates to a method for adjusting the sound volume in consideration of individual hearing characteristics and speaker transmission characteristics, and a sound volume control device using the same. More specifically, in consideration of the hearing characteristics and the transmission characteristics of the speaker having a minimum audible threshold characteristics different from person to person The present invention relates to a method of adjusting the sound volume in consideration of individual hearing characteristics and speaker transmission characteristics and to controlling the sound size using the same, by controlling the volume of the sound.

In general, health disorders such as hearing loss due to noise are mainly focused on noise generated at workplaces, but not only those workers but also those who have not been exposed to noise professionally. In some cases, noise-induced hearing loss may occur due to the sound of music in a performance hall or the like. In particular, in recent years, with the rapid expansion of portable audio equipment, noise-induced hearing loss has increased due to this, and the maximum volume of such personal audio equipment is 78 to 136 dB. Permanent hearing loss may occur when it is used for a long time. .

However, in the conventional sound system, the loudness adjustment method of the sound system has a high sensitivity by adjusting the volume of the sound linearly for all frequencies without considering the frequency hearing characteristics of individuals having different sensitivity for each frequency. Is causing. There are standard hearing characteristics to improve this, and the smoothing method using the ISO266: 2003 standard, but the isotropic curve according to the ISO266: 2003 standard is the hearing characteristics of the average for many people, so it is not suitable for the individual hearing characteristics modified by various environments. In addition, there is a problem that the effect is substantially less effective in reducing hearing damage because it does not consider uneven speaker transfer characteristics for each frequency in reproducing it.

The present invention has been made to solve the above-described problems of the prior art, by adjusting the sound volume in consideration of the hearing characteristics of the individual and the speaker transmission characteristics of the audio device or communication device for each person, the hearing damage by the sound device and the communication device The purpose of the present invention is to provide a sound volume control method considering the individual hearing characteristics and speaker transmission characteristics and to adjust the sound size using the same, so as to reduce the noise and output a clear sound for the individual.

In order to achieve the above object, the present invention includes a setting step of setting the minimum audible limit sound based on the ISO266: 233 standard isotropic curve as the first reference sound of an acoustic device or a communication device; Determining whether or not the first reference sound is the minimum audible sound of the individual by allowing the individual to listen to the first reference sound set in the setting step; A measurement step of measuring the minimum audible sound of the individual when it is determined in the determination step that the reference sound is not the minimum audible sound of the individual; A determination step of determining the minimum audible sound of the individual identified through the determination step or the measurement step as the second reference sound of the individual; An adjusting step of adjusting a sound level of the sound device or the communication device based on the second reference sound determined through the determining step; A compensation step of adjusting in the adjusting step to compensate the sound output through the speaker of the sound device or the communication device according to the transmission characteristic of the speaker; An output step of outputting the sound compensated through the compensation step through the speaker; wherein, in the measuring step, the pure sound corresponding to 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, and 8000 Hz is sounded or communication device. By outputting an irregular size through the individual to measure the magnitude of the minimum audible sound that can be heard by the individual to the pure tone of each frequency.

delete

(1)

(One)

는 주파수

에 대한 ISO266:233 표준 등청감곡선 상의 최대가청한계 소리이고,

는 주파수

에 대하여 측정한 개인의 최소가청소리 혹은 ISO266:233 표준 등청감곡선 상의 최소가청한계 소리이고,

는 주파수

에 대하여 소리 크기를 조절하는 간격을 의미하고,

은 소리 크기를 조절하는 레벨을 나타낸다.)(here,

Frequency

Is the maximum audible limit sound on the ISO266: 233 standard isometric curve for,

Frequency

Is the minimum audible sound of the individual measured for, or the minimum audible limit sound on the ISO266: 233 standard isometric curve;

Frequency

Mean the interval for adjusting the sound volume,

Indicates the level of sound volume control.)

(2)

(2)

은 소리 크기의 레벨을 의미하는 계수이고,

는 주파수

에서의

번째 소리 크기이며,

은

보다 낮은 레벨 크기를 의미한다.)(here,

Is a coefficient representing the level of loudness,

Frequency

In

Sound volume,

silver

It means lower level size.)

On the other hand, in the adjusting step, the difference between the minimum audible sound of the individual measured in the measuring step and the minimum audible limit sound of the ISO266: 233 standard isotropic curve is obtained from the equation (1) and substituted into the equation (2). You can adjust the sound volume at regular intervals,

(3)

(3)

는 주파수

에서의

번째 소리 크기이고,

는 주파수

에 대하여 측정한 개인의 최소가청소리 혹은 ISO266:233 표준 등청감곡선 상의 최소가청한계 소리이며,

는 주파수

에 대하여 소리 크기를 조절하는 간격을 의미 하는 0을 포함한 정수를 의미한다.)(here,

Frequency

In

Second sound level,

Frequency

The minimum audible sound of an individual measured for or the minimum audible threshold sound on the ISO266: 233 standard isochronous curve,

Frequency

An integer containing 0, which means the interval for adjusting the sound volume.

Characterized in accordance with the formula (3) for each frequency according to the minimum audible sound of the individual measured in the measuring step characterized in that for adjusting.

는 주파수가 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz일 때 10dB이며, 상기 보상단계에서는 상기 스피커의 전달특성(

)을 보상할 수 있도록 그 전달특성(

)에 대해 역(

)으로 평활화(equalization)하는 것을 특징으로 한다.Additionally in the adjusting step

Is 10dB when the frequency is 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz, and in the compensation step,

) So that its transmission characteristics (

Reverse for

It is characterized in that the equalization ().

According to an aspect of the present invention, there is provided a device for adjusting and outputting a sound volume of an acoustic device or a communication device, the apparatus comprising: a first external input unit configured to receive a signal for a sound volume interval from an individual to measure a minimum audible limit sound of the individual; A control unit for controlling a sound volume of a predetermined interval to be output to the sound apparatus or the communication apparatus according to the signal of the first external input unit; A storage unit configured to receive the minimum audible limit sound of the individual measured through the sound output to the sound device or the communication device under control of the controller from the first external input unit, and to store the minimum audible limit sound of the individual; A second external input unit for adjusting a sound output from the sound device or the communication device based on the minimum audible limit sound or the standard minimum audible limit sound of the individual stored in the storage unit; A smoothing unit for controlling an equalizer of the sound device or the communication device through the control unit according to a signal from the second external input unit to compensate for the sound adjusted for each frequency according to the speaker transmission characteristic of the sound device or the communication device; Characterized in that consists of.

As described above, the method for adjusting the loudness in consideration of the individual hearing characteristics and the speaker transmission characteristics and the loudness adjusting apparatus using the same according to the present invention are based on the ISO266: 2003 standard isochronous curve based on the loudness of the acoustic device or the communication device. By adjusting according to the hearing characteristics of each person step by step and reflecting the adjusted sound to the speaker transmission characteristics to reduce the hearing damage of the individual by the acoustic device or communication device and to provide a clear sound for the personal hearing characteristics.

Hereinafter, with reference to the drawings I will be described a sound volume control method and the sound volume control device using the same considering the individual hearing characteristics and speaker transmission characteristics according to the present invention.

1 is a flowchart illustrating a sound volume adjusting method considering individual hearing characteristics and speaker transmission characteristics according to the present invention, and FIG. 10 is a flowchart illustrating a sound volume adjusting method considering individual hearing characteristics and speaker transmission characteristics according to the present invention. It is also.

According to the present invention, the sound volume adjusting method considering the individual hearing characteristics and the speaker transmission characteristics basically sets the minimum audible threshold sound based on the ISO266: 233 standard isotropic curve as the first reference sound of an acoustic device or a communication device ( S10 and a determination step (S20) of determining whether the first reference sound is the minimum audible sound of the individual by allowing an individual to listen to the first reference sound set in the setting step (S10), and the determining step (S20). If it is determined that the first reference sound is not the minimum audible sound of the individual, through the measuring step (S30) and the determination step (S20) or measuring step (S30) of measuring the minimum audible sound of the individual A determination step (S40) of determining the minimum audible sound of the identified individual as the second reference sound of the individual, and a sound of the sound device or the communication device based on the second reference sound determined through the determination step (S40) An adjusting step (S50) for adjusting the size, a compensating step (S60) for adjusting the sound output through the speaker of the sound device or the communication device adjusted in the adjusting step (S50) according to the transmission characteristic of the speaker; And an output step S70 of outputting the sound compensated through the compensation step S60 through the speaker.

The loudness of the initial reference sound of the sound device or communication device applied to the present invention, that is, the first reference sound, is based on the ISO266: 2003 standard isometric curve as shown in the graph showing the ISO266: 233 standard isometric curve of FIG. 2. . According to the ISO266: 2003 standard isometric curve, the average human characteristic has good auditory sensitivity to hear small sounds centered on the 3.5 kHz frequency, and relatively sensitive to sounds higher or lower than the 3.5 kHz frequency. Not good That is, because the sensitivity of hearing is good at 3.5 kHz, the sound can be heard without increasing the loudness, and the sound must be loud because the sensitivity is low for sounds higher or lower than 3.5 kHz. However, the ISO266: 2003 standard, as mentioned above, is an average hearing-sensing characteristic for many people, so hearing modified by a variety of personal acoustic environments, such as innate factors, illness, working conditions, and music listening habits. It is inappropriate to provide sound based on standard isochronous curves to individuals who have characteristics.

On the other hand, Figure 3 is a graph showing the relationship between the noise exposure allowance time and size for each frequency, in which 120 dB is set as the maximum audible limit and shows the noise exposure allowance time and size for each frequency. When providing pure noise at the same frequency, the allowable time for not damaging the hearing varies from frequency to frequency. In addition, if the pure sound by frequency is exposed for the same time, the amount of sound that is allowed in order not to damage the hearing varies by frequency. For example, a pure sound at 250 Hz frequency is allowed to be exposed for 30 minutes at 120 dB, while a pure sound at 3 kHz is allowed to be exposed for 30 minutes at 90 dB. Therefore, in order not to adversely affect the hearing even when the same time is exposed for each frequency, it is necessary to set the volume of the sound differently for each frequency.

There is a similar correlation when comparing the standard isotropic curve of FIG. Frequency bands that are sensitive to human hearing in accordance with the standard isochronous curves have shorter noise exposure times and are not large. Therefore, providing sound with the same loudness for all frequencies when adjusting the loudness may adversely affect hearing in a sensitive frequency band. For example, a person is sensitive to sound at a frequency of 3 kHz, and the sound loss in the 3 kHz band can be reduced by providing a small amount of sound for a relatively same time compared to other frequency bands. In addition, the isochronous curve shown in FIG. 2 has a form in which the size change is similar to the shape of the frequency characteristic of the minimum audible limit of the standard isotropic curve. Accordingly, in order to provide a sound that is suitable for different hearing characteristics, the minimum audible sound of each individual is measured, and the sound volume is adjusted based on the same to adjust the amplitude for all frequencies to prevent hearing damage at a specific frequency. Can be reduced.

In the setting step S10, as shown in FIG. 1, the initial reference sound (first reference sound) of the sound device or the communication device is set as the minimum audible limit of the standard isometric hearing curve, and the adjustment of the sound volume is also performed according to ISO266: 233 standard. Depending on the curve, different levels of sound are provided. If the listener wants to adjust the loudness to suit his / her personal hearing characteristics, he or she measures the minimum audible sound of the individual and sets it as the minimum audible sound measured by the first reference sound. Can reduce hearing damage.

In the measuring step (S30), generally, the minimum audible sound of the individual must be measured with respect to the frequency and the magnitude, but for the convenience of the measurement and the convenience of the processing, the magnitude is adjusted in discrete units with respect to discrete discrete frequencies. For example, the detailed description is as follows. Figure 4 is a measure of the minimum audible sound characteristics for 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz for a specific individual, Figure 5 is based on this when adjusting the device for adjusting the volume of sound based on each frequency This is an example of setting to provide different sound levels. The minimum audible threshold characteristic is set by measuring the minimum audible sound for the pure sound of each frequency by providing irregular frequencies and magnitudes of pure sound of 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, and 8000Hz. The criteria of the minimum audible measurement frequency described as described above are not limited thereto and may be provided as more precise criteria, such as 250 Hz, 500 Hz, 750 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz, 3000 Hz, 3500 Hz, 4000 Hz, 6000 Hz, 8000 Hz. There will be.

The sound volume is adjusted based on the minimum audible sound (second reference sound) as follows. The difference in sound pressure level is shown in Table 1 when the loudness is increased in units of 10 phones on the standard isometric curve. At 1000 Hz, the 10 phone difference is equal to 10 dB. At other frequencies, the average value varies from 9.5 dB to 10.8 dB.

Table 2 shows the result of calculating the increasing interval between the minimum and maximum audible limits (maximum audible limit-minimum audible limit) / 9 for each frequency in the standard isometric curve. It is consistent with the mean value in Table 1.

Frequency (Hz) 250.0 500.0 1000.0 2000.0 3000.0 4000.0 8000.0 10Phone-0Phone Car (dB) 13.8 11.5 10.0 11.4 12.1 12.3 11.2 20Phone-10Phone Car (dB) 10.7 10.4 10.0 10.9 11.2 11.3 10.5 30Phone-20Phone Car (dB) 9.5 9.9 10.0 10.6 10.8 10.9 10.2 40Phone-30Phone Car (dB) 8.9 9.7 10.0 10.5 10.6 10.6 10.1 50Phone-40Phone Car (dB) 8.6 9.5 10.0 10.4 10.4 10.5 10.0 60Phone-50Phone Car (dB) 8.5 9.5 10.0 10.3 10.4 10.4 9.9 70Phone-60Phone Car (dB) 8.4 9.4 10.0 10.3 10.3 10.4 9.9 80Phone-70Phone Car (dB) 8.4 9.4 10.0 10.3 10.3 10.4 9.9 90Phone-80Phone Car (dB) 8.3 9.4 10.0 10.3 10.3 10.3 9.9 Average 9.5 9.9 10.0 10.6 10.7 10.8 10.2

Table 1. Sound pressure level difference by 10 phone difference at the main frequency of standard isotropic curve

Frequency (Hz) 250.0 500.0 1000.0 2000.0 3000.0 4000.0 8000.0 (Maximum Audible Limit-Minimum Audience Limit) / 9 9.5 9.9 10.0 10.6 10.7 10.8 10.2

Table 2. Increasing interval (dB) from the minimum audible limit to the maximum audible limit for the main frequency of the standard isotropic curve. Therefore, in the present invention, the first method of controlling the loudness is measured by the following equations (1) and (2). The magnitude of the difference between the minimum audible limit and the maximum audible limit of the standard isotropic curve is divided by logarithmic intervals.

(1)

(One)

(2)

(2)

는 주파수

에 대한 표준 등청감곡선 상의 최대가청한계, 즉, 사람이 들을 수 있는 최대크기의 소리이며,

는 주파수

에 대하여 측정한 최소가청한계 혹은 표준 등청감곡선 상의 최소가청한계, 즉, 사람이 들을 수 있는 가장 작은 소리이다.

는

에 대하여 소리 크기를 조절하는 간격을 의미한다.

은 소리 크기를 조절하는 단계를 나타내며, 디지털 음향기기 혹은 통신기기에서는 7 혹은 14 단계 등으로 조절할 수 있는 값이고

은 소리 크기의 각 단계를 나타내는 계수이다.

는 주파수

에서의

번째 소리 크기이며,

은

보다 낮은 단계 크기를 의미하며, 식(2)는 소리를 크게 하는 과정이며, 소리를 작게 할 경우에는

만큼 빼기를 한다.here,

Frequency

Is the maximum audible limit on the standard isometric curve for, that is, the loudest human hearing

Frequency

This is the minimum audible limit measured for, or the minimum audible limit on the standard isometric curve, that is, the smallest sound a human can hear.

Is

Means the interval to adjust the sound volume.

Indicates the step of adjusting the sound volume, and it is a value that can be adjusted in 7 or 14 steps in the digital sound device or communication device.

Is a coefficient representing each stage of loudness.

Frequency

In

Sound volume,

silver

It means lower step size. Equation (2) is the process of making the sound louder.

Subtract by

The second method is to increase the frequency at regular intervals, for example, at 10 dB intervals, as shown in Eq. (3), based on the minimum audible limits measured based on Table 1, which controls the loudness.

(3)

(3)

는

에 대하여 소리 크기를 조절하는 간격을 의미하며, 보편적으로는 표 1과 2에서 언급한 주파수에 대해서는 10 dB을 적용한다. 디지털 음향기기 혹은 통신기기에서의 불연속적인 소리 크기 단계를 나타내며, 0을 포함한 정수를 갖는다.here,

Is

It is the interval to adjust the sound volume with respect to. In general, 10 dB is applied to the frequencies mentioned in Tables 1 and 2. Represents a discontinuous loudness level in digital audio or telecommunications equipment, and has an integer including zero.

을 보상할 수 있도록 스피커의 전달특성에 대한 역(inverse),

으로 평활화(equalization)를 한다. 도 8은 스피커 전달특성을 보상하기 위한 평활화를 디지털 음향기기와 통신기기에 주로 사용하는 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz를 기준으로 보정하는 예이다. On the other hand, the speaker transmission characteristics of a general sound device or communication device is not flat as shown in FIG. By adjusting the volume of sound based on the individual hearing characteristics, that is, the minimum audible limit, the output is finally distorted by the speaker's uneven speaker transmission characteristics at the stage to achieve the object of the present invention. There will be no. Therefore, as shown in FIG.

The inverse of the speaker's propagation characteristics,

To equalize. FIG. 8 illustrates an example of correcting smoothing for compensating speaker transmission characteristics based on 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, and 8000 Hz, which are mainly used in digital audio and communication devices.

9 is a block diagram illustrating an apparatus for adjusting a sound volume in consideration of individual hearing characteristics and speaker transmission characteristics according to the present invention.

Sound volume control device considering the individual hearing characteristics and speaker transmission characteristics according to the present invention is a device for outputting by adjusting the sound volume of the sound device or communication device, the sound volume interval from the individual to measure the minimum audible limit sound of the individual A first external input unit for receiving a signal for the controller, a control unit for controlling a sound volume of a predetermined interval for each frequency according to the signal of the first external input unit to the sound apparatus or the communication apparatus, and by the control of the controller A storage unit configured to receive the minimum audible limit sound of the individual measured through the sound output to the sound device or the communication device from the first external input unit, and to store the minimum audible limit sound of the individual; The sound equipment or communication based on the minimum audible threshold sound or the standard minimum audible threshold sound of the individual; The second external input unit for adjusting the sound output from the new device and the equalizer of the sound device or the communication device through the control unit in accordance with the signal from the second external input unit to the sound adjusted in size for each frequency It is composed of; a smoothing unit for compensating according to the speaker transmission characteristics of the sound device or communication device.

단위로 소리의 크기를 크게 하면서 측정하도록 이루어지며, 이러한 측정된 개인의 최소가청소리는 저장부에 저장된다. 사용자가 개인청력에 맞춘 최소가청소리를 기준으로 하지 않을 때는 기본적으로 이미 저장되어 있는 표준 최소가청한계를 기준으로 소리의 크기를 조절한다.Measurement of the minimum audible sound of the individual by the control of the first external input unit,

It is made to measure while increasing the volume of sound in units, the minimum audible sound of the measured individual is stored in the storage. When the user does not reference the minimum audible sound for personal hearing, the sound is basically adjusted based on the standard minimum audible limit already stored.

The controller controls the sound volume through the second external input unit based on the measured minimum audible sound or the standard minimum audible limit stored in the storage unit. Alternatively, the equalizer is controlled according to the formula in (3) to adjust the size for each frequency and input the same to the speaker smoothing unit.

The speaker smoothing unit smoothes the sound signal to be output to compensate for the speaker's transmission characteristics, and outputs the sound signal to the main amplifier by outputting it to the main amplifier.

Sound volume control method considering the individual hearing characteristics and speaker transmission characteristics and the device using the same according to the present invention has been described discontinuous description of the frequency and magnitude around the digital sound device and communication device for illustrative purposes. It can also be applied to analog devices that are continuous.

1 is a flow chart illustrating a sound volume control method in consideration of the individual hearing characteristics and speaker transmission characteristics according to the present invention.

FIG. 2 is a graph depicting the ISO266: 233 standard isometric curve. FIG.

Figure 3 is a graph showing the relationship between the noise exposure allowance time and magnitude for each frequency.

4 is a graph illustrating exemplary measurement of individual hearing characteristics.

5 is a graph illustrating an example of adjusting the sound volume for each frequency in consideration of individual hearing characteristics.

6 is a graph illustrating an example of distorted speaker transmission characteristics.

7 is a diagram illustrating a speaker transmission characteristic compensation scheme.

8 is a graph illustrating an example of setting (smoothing) for each frequency for compensating speaker transmission characteristics.

9 is a block diagram showing a sound volume control device in consideration of the individual hearing characteristics and speaker transmission characteristics according to the present invention.

10 is a sequential diagram illustrating a sound volume adjusting method in consideration of individual hearing characteristics and speaker transmission characteristics according to the present invention.

Claims (7)

A setting step (S10) of setting the minimum audible limit sound based on the ISO266: 233 standard isometric curve as a first reference sound of an acoustic device or a communication device; Determining whether the first reference sound is the minimum audible sound of the individual by allowing the individual to listen to the first reference sound set in the setting step (S10); A measurement step (S30) of measuring the minimum audible sound of the individual when it is determined in the determination step (S20) that the first reference sound is not the minimum audible sound of the individual; A determination step (S40) of determining the minimum audible sound of the individual identified through the determination step (S20) or the measurement step (S30) as the second reference sound of the individual; An adjusting step (S50) of adjusting a sound volume of the sound device or the communication device based on the second reference sound determined through the determining step (S40); A compensating step (S60) of adjusting in the adjusting step (S50) and compensating for the sound output through the speaker of the sound device or the communication device according to the transmission characteristic of the speaker; Output step (S70) for outputting the sound compensated through the compensation step (S60) through the speaker; In the measuring step (S30) by outputting the pure sound corresponding to the 250Hz, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz in an irregular size through the sound device or communication device, the individual can hear about the pure sound of each frequency Sound volume control method considering the individual hearing characteristics and speaker transmission characteristics, characterized in that for measuring the size of the minimum audible sound. delete The method according to claim 1, In the adjusting step (S50),

(One) (here,

Frequency

Is the maximum audible limit sound on the ISO266: 233 standard isometric curve for,

Frequency

Is the minimum audible sound of the individual measured for, or the minimum audible limit sound on the ISO266: 233 standard isometric curve;

Frequency

Mean the interval for adjusting the sound volume,

Indicates the level of sound volume adjustment)

(2) (here,

Is a coefficient representing the level of loudness,

Frequency

In

Sound volume,

silver

It means lower level size.) The difference between the minimum audible sound of the individual measured in the measuring step (S30) and the minimum audible limit sound of the ISO266: 233 standard isotropic curve is obtained from Equation (1) and substituted into the Equation (2). Sound volume control method considering the individual hearing characteristics and speaker transmission characteristics, characterized in that divided by a predetermined interval to adjust. The method according to claim 1, In the adjusting step (S50),

(3) (here,

Frequency

In

Second sound level,

Frequency

The minimum audible sound of an individual measured for or the minimum audible threshold sound on the ISO266: 233 standard isochronous curve,

Frequency

An integer containing 0, which means the interval for adjusting the sound volume. Sound volume control method considering the individual hearing characteristics and speaker transmission characteristics, characterized in that for each frequency divided by a predetermined interval according to the formula (3) according to the minimum audible sound of the individual measured in the measuring step (S30) . The method according to claim 4, In the adjusting step (S50)

The sound volume control method considering the individual hearing characteristics and speaker transmission characteristics, characterized in that the frequency is 250dB, 500Hz, 1000Hz, 2000Hz, 3000Hz, 4000Hz, 8000Hz 10dB. The method according to claim 3 or 4, In the compensation step (S60) the transmission characteristics of the speaker (

) So that its transmission characteristics (

For the station (

Sound volume control method considering the individual hearing characteristics and speaker transmission characteristics characterized in that the equalization (). In the device for outputting the sound volume of the sound device or communication device, A first external input unit which receives a signal for a sound volume interval from the individual to measure the minimum audible threshold sound of the individual; A control unit for controlling a sound volume of a predetermined interval to be output to the sound apparatus or the communication apparatus according to the signal of the first external input unit; A storage unit configured to receive the minimum audible limit sound of the individual measured through the sound output to the sound device or the communication device under control of the controller from the first external input unit, and to store the minimum audible limit sound of the individual; A second external input unit for adjusting a sound output from the sound device or the communication device based on the minimum audible limit sound or the standard minimum audible limit sound of the individual stored in the storage unit; A smoothing unit for controlling an equalizer of the sound device or the communication device through the control unit according to a signal from the second external input unit to compensate for the sound adjusted for each frequency according to the speaker transmission characteristic of the sound device or the communication device; Sound volume control device considering the individual hearing characteristics and speaker transmission characteristics, characterized in that consisting of.

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