Question

How do amplitude and frequency effect the voice quality?​

Answer 1

Answer:

Taken together, these results reveal that while voice production undergoes important changes throughout aging, the ability to increase/decrease the amplitude and frequency of voice are preserved, at least within the age range studied, and that depression and anxiety scores have a stronger impact on perceived voice ...

Answer 2

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The effect of amplitude and frequency can change the pitch and timbre of the voice.