The pleasing sounds are called
Music.
Noise.
loudness.
None of these.
Which of the following statements is correct?
Sound can travel through vacuum but light cannot
Sound needs medium, but light doesn't needs medium for its propagation
Sound and light both require medium for propogation
Sound and light both cannot travel in a medium
Sound can be produced by use of which of the following objects?
Expanding objects
Opaque objects
Hot objects
Vibrating objects
The to and fro motion of an object is known as vibration.This motion is called
vibrating motion.
oscillatory motion.
modulatory motion.
none of these.
The size of vocal chords of men is :
20 mm
19 mm
18 mm
1 cm
What is the loudness of Busy traffic?
10 dB
30 dB
70 dB
100 dB
To and fro motion of a particle about its mean position is called
Frequency
Amplitude
Wavelength
Vibration
What is the loudness of normal breathing?
7dB
9 dB
-10 dB
The eardrum is like
Stretched rubber sheet.
Stretched string.
Air column.
Unwanted sounds are called
Loudness.
