PDF chapter test TRY NOW
Choose the correct word given in the table :
decreased | increased | Cochlea |
Amplitude | auditory | noise pollution |
larynx | infrasonic | energy |
Shriller | Frequency | Voice box |
1. Sound of frequency lower than 20 Hz is called the .
2. sound has more frequency.
3. If the thickness of a vibrating string is, it will reduce its pitch.
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