Automotive Speech Intelligibility Measurements
Speech communication from the front seat to the rear seat in a passenger vehicle can be difficult. This is particularly true in a vehicle with an acoustically absorptive interior. Speech transmission index (STI) measurements can quantify speech intelligibility, but they require specialized signal pr...
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| Veröffentlicht in: | Sound & vibration 2017-06, Vol.51 (6), p.6 |
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| creator | Ebbitt, Gordon L Remtema, Todd M |
| description | Speech communication from the front seat to the rear seat in a passenger vehicle can be difficult. This is particularly true in a vehicle with an acoustically absorptive interior. Speech transmission index (STI) measurements can quantify speech intelligibility, but they require specialized signal processing. The STI calculations can be simplified if it is assumed that reverberation and echoes play an insignificant role in an automobile. A simplification of a STI measurement is described that uses a stationary reference speech signal from a talker mannequin in the driver's seat to create a signal at rear passenger positions. On-road noise measurements are used for the noise level, and the calculated signal-to-noise ratio is used to calculate a simplified STI value that tracks closely to a full implementation of the STI method for sedans. In fact, this method is very similar to the techniques described in the articulation index (AI) and speech interference index (SII) standards. Those standards provide for the use of a talker mannequin, though that is rarely done. The use of all three measurement techniques is considered. |
| format | Magazinearticle |
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This is particularly true in a vehicle with an acoustically absorptive interior. Speech transmission index (STI) measurements can quantify speech intelligibility, but they require specialized signal processing. The STI calculations can be simplified if it is assumed that reverberation and echoes play an insignificant role in an automobile. A simplification of a STI measurement is described that uses a stationary reference speech signal from a talker mannequin in the driver's seat to create a signal at rear passenger positions. On-road noise measurements are used for the noise level, and the calculated signal-to-noise ratio is used to calculate a simplified STI value that tracks closely to a full implementation of the STI method for sedans. In fact, this method is very similar to the techniques described in the articulation index (AI) and speech interference index (SII) standards. Those standards provide for the use of a talker mannequin, though that is rarely done. 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| fulltext | fulltext |
| identifier | ISSN: 1541-0161 |
| ispartof | Sound & vibration, 2017-06, Vol.51 (6), p.6 |
| issn | 1541-0161 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Absorptivity Acoustic absorption Acoustic measurement Acoustic noise Acoustics Artificial intelligence Echoes Intelligibility Mathematical analysis Measurement techniques Mechanical engineering Methods Noise control Passengers Product development Signal processing Signal to noise ratio Simplification Speech Speech disorders Vehicles |
| title | Automotive Speech Intelligibility Measurements |
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