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Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal. STI is a well-established objective measurement predictor of how the characteristics of the transmission channel affect speech intelligibility.

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dbo:abstract
  • Der Sprachübertragungsindex, kurz STI (von englisch Speech Transmission Index), ist ein Maß für die Qualität, in der eine Übertragungsstrecke Sprache vom Sprecher zum Zuhörer überträgt. Als Übertragungsstrecke wird dabei eine akustische oder elektro-akustische Sprachsignal-Übertragung verstanden. Die Maßzahl STI beschreibt die zu erwartende Sprachverständlichkeit beim Zuhörer. (de)
  • Le Speech Transmission Index (STI) est une mesure de l'intelligibilité de la parole. Cette mesure est dérivée de la fonction de transfert de modulation (FTM) qui évalue la dégradation des modulations d'amplitude par bandes de fréquences. (fr)
  • Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal. STI is a well-established objective measurement predictor of how the characteristics of the transmission channel affect speech intelligibility. The influence that a transmission channel has on speech intelligibility is dependent on: * the speech level * frequency response of the channel * non-linear distortions * background noise level * quality of the sound reproduction equipment * echos (reflections with delay > 100ms) * the reverberation time * psychoacoustic effects (masking effects) (en)
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  • 19071 (xsd:nonNegativeInteger)
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dbp:description
  • A sample of a STIPA test signal from NTi Audio (en)
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  • Stipa demo.ogg (en)
dbp:title
  • "STIPA Test Signal" (en)
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  • Der Sprachübertragungsindex, kurz STI (von englisch Speech Transmission Index), ist ein Maß für die Qualität, in der eine Übertragungsstrecke Sprache vom Sprecher zum Zuhörer überträgt. Als Übertragungsstrecke wird dabei eine akustische oder elektro-akustische Sprachsignal-Übertragung verstanden. Die Maßzahl STI beschreibt die zu erwartende Sprachverständlichkeit beim Zuhörer. (de)
  • Le Speech Transmission Index (STI) est une mesure de l'intelligibilité de la parole. Cette mesure est dérivée de la fonction de transfert de modulation (FTM) qui évalue la dégradation des modulations d'amplitude par bandes de fréquences. (fr)
  • Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal. STI is a well-established objective measurement predictor of how the characteristics of the transmission channel affect speech intelligibility. (en)
rdfs:label
  • Speech Transmission Index (de)
  • Speech Transmission Index (fr)
  • Speech transmission index (en)
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