EVALUATION VALUE CALCULATING METHOD, AND SPATIAL CHARACTERISTICS DESIGNING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an evaluation value calculating method capable of calculating a voice transmitting performance evaluation indicator in a transmission system in which signal processing by a generation source encoding formula intervenes between a sound source and a sound receiving point.;SOLUTION: An evaluation value calculating method by which, when collected voice signals are encoded by a generation source encoding formula and voice is reproduced by using the encoded signals, a voice transmitting performance evaluation indicator for evaluating how difficult the reproduced voice is to hear is calculated, comprises: an acquisition step S10 of acquiring an impulse response waveform ((A) in Fig. 4) on a communication route from a first loudspeaker 1a to a first microphone 3a; an attenuation removal step S12 of dividing the impulse response waveform by a Schroeder attenuation curve to calculate an attenuation-removed impulse response waveform ((B) in Fig. 4); and a calculation step S14 of calculating a voice transmitting performance evaluation indicator by using the attenuation-removed impulse response waveform.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2016,JPO&INPIT