JP3686897B2 - Aluminum cable for audio - Google Patents

Description

表１より明かなように、人間の聴覚で感じる音質としては、本発明のケーブルの方が格段に優れている。
【００１３】
次に、オシロスコープを用いて上記応用例及び比較例記載のオーディオシステムによる再生音の波形の比較を行なった。
オシロスコープの端子をアンプのスピーカー出力端子に接続し、５５Ｈｚの低周波の音とそれより高い１５６Ｈｚの音を録音したＣＤをＣＤプレイヤーで再生し、それぞれの音の波形をオシロスコープで計測した。計測結果を図４ａ及び図４ｂに示す。
図４ａ及び図４ｂから明らかなように、５５Ｈｚの音及び１５６Ｈｚの音の双方について本発明のオーディオ用ケーブルの方が市販のオーディオケーブルよりもノイズが低い。つまり、再生音のＳＮ比が高く、クリアな音が得られている。
【００１４】
【発明の効果】
以上説明したように、本発明によれば、従来のオーディオケーブルに比し、再生音の音源が明確になり、音が明瞭でＳＮ比が高く、音の余韻と響きが原音により近くなるなど、音質が飛躍的に向上するという効果がある。
【図面の簡単な説明】
【図１】従来からの一般的なオーディオ用ケーブルの断面図である。
【図２】本発明のオーディオ用ケーブルの断面図である。
【図３】応用例及び比較例で使用したオーディオシステムの構成図である。
【図４】応用例及び比較例で使用したオーディオシステムで５５Ｈｚの音を再生した場合のオシロスコープによる波形図である。
【図５】応用例及び比較例で使用したオーディオシステムで１５６Ｈｚの音を再生した場合のオシロスコープによる波形図である。
【符号の説明】
１ａ：芯線（導体）
１ｂ：芯線（アルミニウム単芯導体）
２：絶縁体
３：緩衝材
４：金属箔シールド
５：チューブシールド
６，７：間隙（空気層）
８：ＣＤプレイヤー
９：アンプ
１０ａ，１０ｂ：スピーカー
１１ａ，１１ｂ：スピーカーケーブル
１２：ＲＣＡケーブル
１３：ＣＤプレイヤーの電源ケーブル
１４：アンプの電源ケーブル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an audio cable in which aluminum is selected as a core material.
[0002]
[Prior art]
Cables used for audio have conventionally used copper as a core material, and among them, copper materials that do not contain impurities such as oxygen-free copper have been favored and used to improve sound quality.
As shown in FIG. 1, an audio cable that is normally used has a surface of a core wire 1 a made of a conductor such as copper directly covered with an insulator 2. The core wire 1a may be a single thick wire, but usually a wire in which a number of fine wires are twisted as shown in the figure. A buffer material 3, then a metal foil shield 4, and a tube shield 5 are arranged outside the insulator 2 in the radial direction. Silk or the like is used as the material of the buffer material 3, and copper is usually used as the material of the metal foil shield 4. In an audio system, in order to faithfully reproduce an original sound, it is important to smoothly flow a current as a sound signal and remove the influence of noise as much as possible. For this reason, it is related to the purity of the copper material, as shown in FIG. 1, the periphery of the core wire 1 a is covered with the insulating material 2, a structure in which a thin copper wire is knitted, or the like is expensive. It had become. However, even if such an expensive cable is used as an audio cable, the reverberation and reverberation of sound that can be obtained during live performance of a musical instrument cannot be obtained sufficiently, and the range of the original sound reproduction has not been reached. Is the current situation.
[0003]
[Problems to be solved by the invention]
According to the prior art as described above, when copper or gold cables are used, the intelligibility, strength, and sound of the sound heard from the speaker is increased despite the use of structurally complicated and expensive cables. However, there was a problem that depth, reverberation, etc. were not satisfactory enough for the price.
[0004]
[Means for Solving the Problems]
The current that becomes the sound signal is transmitted by free electrons flowing through the core material. It is presumed that free electrons flow through a thick single-core element wire without resistance and more easily transmit a sound signal than flow through the element wire of a core material in which thin wires gather. Also, considering the sound information as a wave that propagates through the core material, it is better to vibrate freely rather than covering the surface of the core material directly with an insulating material to transmit without losing the amount of sound information. Think.
Therefore, in the present invention, the cable structure is not a stranded wire composed of a large number of thin wires but a single-core structure composed of a single thick wire, and the air gap is formed between the insulating material without directly covering the core material. So that the core can freely vibrate. For core materials, copper with good electrical and thermal conductivity has been used, but copper has high inertia due to its high density, so select aluminum with good electrical conductivity and low density. did.
[0005]
As the aluminum core wire, an aluminum wire simply processed to be used as a wire or an aluminum wire subjected to surface treatment such as alumite treatment is used.
[0006]
The gap width of the gap formed of the air layer is not preferable because it is not substantially different from that directly covering the surface of the core wire if it is about 0.1 mm or less, but can be arbitrarily set if it is more than that. However, since it does not contribute to improvement in sound quality even if it is spread too much, about 0.5 to 2.0 mm is suitable for practical use.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
【Example】
An embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of the audio aluminum cable of this embodiment.
As shown in this figure, in the cable of this example, a core wire 1b made of a single thick aluminum wire of 1.5 mm was used as the conductor. In addition, the aluminum of a wire used the purity of 99.7%.
The core wire 1b is covered with the insulator 2, but the surface of the core wire 1b is not directly covered as usual, but the inner diameter of the insulator 2 is set to 2.5 mm from the air layer to the core wire 1b. The gap 6 is provided. The outer diameter of the insulator 2 was set to 3.0 mm. Further, the inner diameter of the tube shield 5 was 7.0 mm, and a gap 7 made of an air layer was also provided between the insulator 2 and the tube shield 5. The outer diameter of the tube shield 5 was 10.0 mm.
[0008]
The audio cable of the present embodiment has a clear sound source of the musical instrument and a high S / N ratio, and the sound resolution, localization, strength, reverberation, and reverberation of the sound generated from the speaker during playback by the player is much higher than the conventional cable. Close to.
[0009]
[Application examples]
Using the audio cable of the present invention (the cable described in the embodiment), the CD player 8, the amplifier 9, the left speaker 10a and the right speaker 10b as shown in FIG. And an audio system comprising cables 11a, 11b, 12, 13, and 14 for connecting the power source to the power source. Among the cables, the RCA cable 12 that connects the player 8 and the amplifier 9 and the power cables 13 and 14 that connect the player 8 and the amplifier 9 to the power source are the cables described in the first embodiment. The lengths of the RCA cable 12 and the power cables 13 and 14 were all 1 m.
[0010]
[Comparative example]
For comparison, a system having the same configuration as that of the above application example was configured except that a commercially available audio cable (gold prize-winning product) was used.
[0011]
A comparative test was performed using the audio systems described in the application examples and comparative examples.
The distance between the left and right speakers was 2 m, and the listening was performed at a position 3 m from the speakers.
As an index for comparing the sound quality of the reproduced sound, the intelligibility, strength, reverberation, depth, and reverberation of the sound were selected, and the evaluation was made in three stages: good 2 points, normal 1 point, and bad 0 points.
The audition was performed by five people who enjoy music and are in contact with music every day.
The comparison results are shown in Table 1.
[0012]
[Table 1]

As is clear from Table 1, the cable of the present invention is remarkably superior in sound quality perceived by human hearing.
[0013]
Next, the waveforms of the reproduced sound were compared using the audio systems described in the application examples and comparative examples using an oscilloscope.
The oscilloscope terminal was connected to the speaker output terminal of the amplifier, a CD on which a low frequency sound of 55 Hz and a higher sound of 156 Hz were recorded was reproduced with a CD player, and the waveform of each sound was measured with an oscilloscope. The measurement results are shown in FIGS. 4a and 4b.
As is clear from FIGS. 4a and 4b, the audio cable of the present invention has lower noise than the commercially available audio cable for both 55 Hz sound and 156 Hz sound. That is, the reproduced signal has a high S / N ratio and a clear sound is obtained.
[0014]
【The invention's effect】
As described above, according to the present invention, compared to the conventional audio cable, the sound source of the reproduced sound is clear, the sound is clear and the SN ratio is high, the reverberation and reverberation of the sound are closer to the original sound, etc. There is an effect that the sound quality is dramatically improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a conventional general audio cable.
FIG. 2 is a cross-sectional view of an audio cable according to the present invention.
FIG. 3 is a configuration diagram of an audio system used in an application example and a comparative example.
FIG. 4 is a waveform diagram by an oscilloscope when a sound of 55 Hz is reproduced by the audio system used in the application example and the comparative example.
FIG. 5 is a waveform diagram by an oscilloscope when sound of 156 Hz is reproduced by the audio system used in the application example and the comparative example.
[Explanation of symbols]
1a: Core wire (conductor)
1b: Core wire (aluminum single core conductor)
2: Insulator 3: Buffer material 4: Metal foil shield 5: Tube shield 6, 7: Gap (air layer)
8: CD player 9: Amplifiers 10a, 10b: Speakers 11a, 11b: Speaker cable 12: RCA cable 13: CD player power cable 14: Amplifier power cable

Claims (1)

In an audio cable in which the core material of the core wire is aluminum or anodized aluminum, the core wire structure is a single core structure, and a gap composed of an air layer is provided between the core wire and the insulator surrounding it. Characteristic audio cable.

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