De modulatie-overdrachtskarateristiek als voorspeller van spraakverstaanbaarheid in ruimten (The modulation transfer function (MTF) in room acoustics as a predictor of speech intelligibility)
Instituut voor Zintuigfysiologie TNO
Generally, when a signal is passed through an enclosure, the envelope of the received signal is a smoothed version of the originial envelope. Traditionally, this effect of the enclosure is quantified by its reverberation curve. We suggest that the relation between the input and output envelopes can also be described by the action of a filter characteristic, effective upon the input envelope. In the case of smoothing, the filter is essentially a low-pass filter. This filter characteristic (Modulation Transfer Function, MTF) is a specific feature of a given enclosure, applicable to the envelope of any input signal. We investigated the relevance of this MTF for quantifying speech intelligibility for a great number of transmission paths. It appeared that, for each condition, a single value could be deduced from the MTF which correlates highly with the PB-word score.
Acoustics and Audiology
To reference this document use:
Nederlands Akoestisch Genootschap, Voordracht Najaarsvergadering 1972, 29-35
Nederlands Akoestisch Genootschap publicatie