High-rate envelope information in many channels providesresistance to reduction of speech intelligibility producedby multi-channel fast-acting compression (L)

摘要

The intelligibility of speech in a competing-speech background was measured for signals that weresubjected to multi-channel compression and then tone vocoded. The lowpass filter used to extractthe envelopes in the vocoder preserved only low-rate envelope cues (E filter) or also preservedpitch-related cues (P filter). Intelligibility worsened with increasing number of compressionchannels and compression speed, but this effect was markedly reduced when the P filter was usedand the number of vocoder channels was 16 as compared to 8. Thus, providing high-rate envelopecues in many channels provides resistance to the deleterious effects of fast compression.