Human ear

Q.

A man can hear the sound of frequency :

(a) 1 Hz

(b) 1000 Hz

(c) 200 kHz

(d) 5 MHz

Q.

Young children below 5 year can hear up to a frequency of

1. 30 KHz

2. 40 KHz

3. 25 KHz

4. 20 KHz

Q. Question 1
What are wavelength, frequency, time period and amplitude of a sound wave?

Q. An open organ pipe has a length of 5 cm. (a) Find the fundamental frequency of vibration of this pipe. (b) What is the highest harmonic of such a tube that is in the audible range? Speed of sound in air is 340 m s⁻¹ and the audible range is 20-20, 000 Hz.

Q.

The wavelength of a sound wave is 3 cm and speed of sound is 340 $m{s}^{-1}$. Will it be audible? [2 MARKS]

Q.

what is phonemic awareness .give some examples

Q. Which of the following frequencies produces sound that is audible?
(a) 5 Hz
(b) 15 Hz
(c) 500 Hz
(d) 50, 000 Hz

Q. Frequency range for speech signals is

1. 300 Hz to 3100 Hz
2. 300 Hz to 3100 MHz
3. 300 kHz to 3100 MHz
4. None of these

Q. In human ear, the vibrations are amplified by:

1. Hammer
2. Anvil
3. Pinna
4. Stirrup

Q. We have two ears because:
i) It helps our brain to sense that from which direction sound is coming.
ii) If there is hearing loss in one ear one can still hear from another.

1. Both statements are true.
2. Both statements are false.
3. Statement (i) is only true.
4. Statement (ii) is only true.