Speech Interference

Noise can interfere with our ability to communicate. Many noises that are not intense enough to cause hearing impairment can interfere with speech communication. The interference or masking effect is a complicated function of the distance between the speaker and listener and the frequency components of the spoken words. The speech interference level (SIL) is a measure of the difficulty in communication that is expected with different background noise levels. Now analysis talk in terms of A-weighted background noise levels and the quality of speech communication (Figure 6.3.3).

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