Range of Frequency

Question 1

Frequency range of human hearing is

Answer 1

20 Hz to 20,000 Hz.

Question 2

Ultrasound is?

Answer 2

Sound waves with frequencies above the normal human range of hearing (above 20,000 Hz)

Question 3

Infrasound is?

Answer 3

Sounds with frequencies below the normal human range of hearing (below 20 Hz).

Question 4

Frequency range of bat hearing is

Answer 4

1000 Hz to 120,000 Hz

Question 5

Frequency range of Dolphin hearing is

Answer 5

150 Hz to 150,000 Hz

Question 6

Frequency range of Dog hearing is

Answer 6

15 Hz to 50,000 Hz

Question 7

Frequency range of Cat hearing is

Answer 7

60 Hz to 65,000 Hz

Question 8

Uses of Ultrasound

Answer 8

Industrial Cleaning of circuit boards or teeth, Breaking down kidney stones, Industrial Quality Control like detecting cracks in metal, Pre-natal scanning of a foetus, Range and direction finding SONAR

Question 9

Doppler Effect

Answer 9

Is the apparent change in the
frequency of a sound caused by the
motion of either the listener or the
source of the sound.

Question 10

Doppler Effect

Answer 10

Is the apparent change in the
frequency of a sound caused by the
motion of either the listener or the
source of the sound.

Question 11

Long Wavelength = Low/High Frequency
Short Wavelength = Low/High Frequency

Answer 11

1. Low Frequency
2. High Frequency

Question 12

Move away from listener =

Answer 12

Lower pitch = Lower frequency

Question 13

Move towards listener =

Answer 13

Higher pitch = Higher frequency