The walls of the halls built for music concerts should ____.
amplify sound
transmit sound
reflect sound
absorb sound
If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of ____.
9
3
6
Intensity level of a sound of intensity I is 30 dB. The ratio is (Where is the threshold of hearing) ____.
3000
1000
300
30
Decibel is unit of ____.
intensity of light
X-rays radiation capacity
sound loudness
energy of radiation
Quality of a musical note depends on ____.
harmonics present
amplitude of the wave
fundamental frequency
velocity of sound in the medium
When we hear a sound, we can identify its source from ____.
amplitude of sound
intensity of sound
wavelength of sound
overtones present in the sound
A man can hear only upto 10 kHz and another man upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then ____.
both will hear sounds of same pitch but different quality
both will hear sounds of different pitch but same quality
both will hear sounds of different pitch and different quality
both will hear sounds of same pitch and same quality
The amplitude of two waves are in ratio 5 : 2. If all other conditions for the two waves are same, then what is the ratio of their energy densities ____.
5 : 2
10: 4
2.5 : 1
25 : 4
A is singing a note and at the same time B is singing a note with exactly one-eighth the frequency of the note of A. The energies of two sounds are equal, the amplitude of the note of B is ____.
same that of A
twice as that of A
four times as that of A
eight times as that of A
The loudness and pitch of a sound depends on ____.
intensity and velocity
frequency and velocity
intensity and frequency
frequency and number of harmonics
If T is the reverberation time of an auditorium of volume V then ____.
The intensity of sound wave while passing through elastic medium falls down by 10 % as it covers one meter distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 meter thickness of the medium is ____.
70 decibel
72.9 decibel
81 decibel
60 decibel
A musical scale is constructed by providing intermediate frequencies between a note and its octave which ____.
form an arithmetic progression
form a geometric progression
bear a simple ratio with their neighbors
form a harmonic progression
In a harmonium the intermediate notes between a note and its octave form ____.
an arithmetic progression
a geometric progression
a harmonic progression
an exponential progression