Audible Range, Infrasonic and Ultrasounds

Q. Ultrasonic sound have frequency ___.

1. below 20 Hz
2. between 20-2, 000 Hz
3. between 2, 000-20, 000 Hz
4. above 20, 000 Hz

Q. Which of the following animals mentioned below can hear infrasonic sound?

1. Elephant
2. Rat
3. Bat
4. Dog

Q.

Question 3 (d)
State whether the following statement is true or false.​
​​​​​​For human ears, the audible range is 20 Hz to 20, 000 Hz.

Q. How does a man’s voice differ from a woman’s voice?

Q.

The unit of quantity on which pitch of the sound depends is

1. Hertz

2. metre

3. metre/second

4. second

Q. Question 2
Which of the following voices is likely to have the minimum frequency?

(a) Baby girl
(b) Baby boy
(c) A man
(d) A woman

Q. In which of the following frequency ranges can Blue whales communicate?

1. Ultrasonic
2. Infrasonic
3. Audible
4. Supersonic

Q.

Define the characteristic pitch.

Q.

what is the difference between fundamental tone and overtone

Q. Which of the following voices is likely to have the minimum frequency?

1. A man
2. A woman
3. Baby girl
4. Baby boy

Q. Which of the following frequencies will be inaudible to human ear?

1. 10 Hz
2. 1, 000 Hz
3. 10, 000 Hz
4. 100 Hz

Q. Match the following range of frequencies with their sounds.

1. Infrasound
2. Audible sound
3. Ultrasound

Q. As compared to audible sound, ultrasonic waves have:

1. Higher frequency
2. Higher energy
3. Smaller wavelength
4. Higher speed

Q. Which among the following frequencies is inaudible to humans?

1. $5Hz$
2. $20Hz$
3. $50Hz$
4. $30Hz$

Q.

Question 4 (e)
Fill in the blank with a suitable word.
Shrillness of a sound is determined by the _______ of vibration.

Q. The ratio of speed of ultrasonic wave and sound wave is:

1. $=1$
2. $>1$
3. $<1$
4. $>1$

Q. Sounds of frquency above $20kHz$ is called:

1. Ultrasonic sound
2. Supersonic sound
3. Infrasonic sound
4. Audible sound

Q. Match the frequency range of the sound with its name.

1. 10 Hz
2. 100 Hz
3. 40 kHz

Q. Sound with frequency less than 20 Hz is called:

1. Infrasonic sound
2. Supersonic sound
3. Ultrasonic sound
4. Sonic sound