Question

Fill in the blanks
1.Birds have a ring of cartilage,called _________ in there wind pipes.
2. The ST unit of 'loudness' of sound, is _________.
3.The pitch of a sound is determined by its_________.
4. Sounds,of frequency more than 20 kHz, are known as
__________.
5.An irregular, irritating sound is referred to as a__________.​

Answer 1

Answer:

1. Tracheal cartilages

2. decibels

3. frequency

4.infrasonic sound

5.Unpleasant voice

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Answer 2

Answer:

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