Which factor affects speech intelligibility?

Which factor affects speech intelligibility?

• A. Distortion
• B. Reverberation
• C. Sound pressure level
• D. All of the above

Answer: (D)

Speech intelligibility is about how clearly spoken words can be understood. Distortion changes the shape of the audio signal, scrambling the phoneme cues that listeners rely on. Reverberation adds echoes and smearing of timing, so the distinct sounds blend together and limits the listener’s ability to separate phonemes. Sound pressure level affects how audible the speech is against background noise; if it’s too soft, the message gets masked by noise, and if it’s excessively loud, it can cause fatigue or masking of other sounds. Because each of these factors can degrade understanding in different ways, all of these factors influence speech intelligibility.

Speech intelligibility is about how clearly spoken words can be understood. Distortion changes the shape of the audio signal, scrambling the phoneme cues that listeners rely on. Reverberation adds echoes and smearing of timing, so the distinct sounds blend together and limits the listener’s ability to separate phonemes. Sound pressure level affects how audible the speech is against background noise; if it’s too soft, the message gets masked by noise, and if it’s excessively loud, it can cause fatigue or masking of other sounds. Because each of these factors can degrade understanding in different ways, all of these factors influence speech intelligibility.