Effect of Length on Frequency

Q.

Define the unit of loudness.

Q. In a normal conversation, the loudness of an average human voice is about:

1. 20 dB
2. 60 dB
3. 80 dB
4. 130 dB

Q. determines the loudness of a sound wave.

1. Frequency
2. Amplitude
3. Wavelength

Q. Loudness of the sound is measured in .

1. metre
2. decibel
3. hertz