Question

A. Match the columns.
Column A
1. Sound
2. Oscillations
3. Pitch
4. Subsonic sound
5. Noise pollution
Column B
A. Periodic motion
B. Frequency
C. Less than 20 Hz
D. High blood pressure
E. Vibrating body​

Answer 1

Explanation:

• 1) sound - Frequency
• 2) oscillation - periodic motion
• 3) pitch - vibrating body
• 4) subsonic - less then 20 Hz
• 5) Noise pollution. - high blood pressure

I hope I'm right

Answer 2

Answer:

1-B (frequency measure in db)

2-A

3-E (voice bandwidth)

4-C

5-D