Question

B. Give one word for the following.
1. Sounds that dogs can hear but humans cannot
2. Sound of a plane passing the speed of sound
3. Sound with a frequency range of 20-20,000 Hz
4. Repetition of sound waves after bouncing off a large surface
5. When different pitches combine in a rhythm​

Answer 1

Answer:

•Question--B. Give one word for the following.

Explanation:

•Answer- 1) silent whistle (Galton's whistle)

•Answer-2)sonic boom

•Answer-3) don't know sorry dear.

•Answer-4)echo

•Answer-5) don't know