The hearing range of human ear is:
20 Hz to 20,000 Hz.
Less than 20 Hz.
More than 20,000 Hz.
20 Hz to 25,000 Hz.
Sound propagates maximum in
Gas
Liquid
Solid
All
The speed of highly penetrating ultrasonic waves is:
lower than those of audible sound waves
higher than those of audible sound waves
much higher than those of audible sound waves
same as those of audible sound waves
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea?
15,000 Hz
100 kHz
50 kHz
10,000 Hz
Voice of which of following is likely to have minimum frequency?
Baby girl
Baby boy
A man
A woman
Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros?
5 kHz
25 Hz
10 Hz
To an fro motion of an object is called
Waves
Amplitude
Vibration
All of the above
The velocities of sound waves in four media P, Q, R and S are 18,000 km/h, 900 km/h, 0 km/h, and 1200 km/h respectively. Which medium could be a liquid substance?
P
Q
R
S
Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?
Stretched strings
Stretched membranes
Metal plates
Air columns
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case:
Sound will be louder but pitch will not be different
Sound will be louder and the ptich will also be higher
Sound will be louder but pitch will be lower
Both loudness and pitch will remain unaffected
