Audible Range

Q.

What do you understand by range of hearing in humans?

Q.

Audio frequency range of human ear is 20 Hz to 20000 Hz. The range of human ear in terms of time period is

1. 5 s to 5 x 10^-5 s

2. 5 x 10^-2 s to 5 x 10^-5 s

3. 50 s to 5 x 10^-5 s

4. 50 s to 50 x 10^-5 s

Q.

(a) What is the frequency range of hearing in humans?

(b) Which of the following sound frequencies cannot be heard by a human ear?

(i) 10 Hz

(ii) 100 Hz

(iii) 10, 000 Hz

(iv) 15 Hz

(v) 40, 000 Hz

Q.

Ultrasonic sounds ___________ be heard by ________.

Q.

Name the sounds of the frequencies given below :

(a) 10 Hz

(b) 100 Hz

(c) 1000 Hz

(d) 40 kHz

Q.

What is range of hearing? Howthis range varies from one person to other and with age

Q.

Audible range of sound of human being is

1. 20 Hz to 10, 000 Hz

2. 20 Hz to 20, 000 Hz

3. 10 Hz to 20, 000 Hz

4. 20 Hz to 2000 Hz

Q.

The audible range of sound that humans can hear is:

1. 20 Hz to 2000 Hz

2. 20 Hz to 10, 000 Hz

3. 10 Hz to 20, 000 Hz

4. 20 Hz to 20, 000 Hz

Q. Which of the following sets of living beings can hear infrasound, audible sound, and ultrasound respectively?

1. Bats, humans, and giraffes
2. Dolphins, humans, and dogs
3. Pigeons, humans, and dolphins
4. Elephants, giraffes, and dolphins

Q. The wavelength of the upper limit of the audible sound in air, is .

1. $17\text{cm}$
2. $17\text{mm}$
3. $17\text{nm}$
4. $17\mu \text{m}$

Q. Which of the following frequency is inaudible to human being?

1. 50Hz
2. 40KHz
3. 1KHz
4. 15KHz

Q. Ultrasound is of frequency

1. below $20Hz$
2. above $20Hz$
3. below $20kHz$
4. above $20kHz$

Q. To detect the obstacles in the path, bats produce ultrasonic sound waves.

1. False
2. True