In one metre long open pipe what is the harmonic of resonance obtained with a tuning fork of frequency 480 Hz
An organ pipe open at one end is vibrating in first overtone and is in resonance with another pipe open at both ends and vibrating in third harmonic. The ratio of length of two pipes is
In a resonance pipe the first and second resonances are obtained at depths 22.7 cm and 70.2 cm respectively. What will be the end correction
An open tube is in resonance with string (frequency of vibration of tube is n0). If tube is dipped in water so that 75% of length of tube is inside water, then the ratio of the frequency of tube to string now will be
Two passenger trains moving with a speed of 108 km/hour cross each other. One of them blows a whistle whose frequency is 750 Hz. If sound speed is 330 m/s, then passengers sitting in the other train, after trains cross each other will hear sound whose frequency will be
A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is v m/sec. The speed of source will be
The walls of the halls built for music concerts should
If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of
If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
Quality of a musical note depends on
When we hear a sound, we can identify its source from
A man x can hear only upto 10 kHz and another man y upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then
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
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
The loudness and pitch of a sound depends on
If T is the reverberation time of an auditorium of volume V then
The intensity of sound wave while passing through an elastic medium falls down by 10% as it covers one metre distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 metre thickness of the medium will be
A musical scale is constructed by providing intermediate frequencies between a note and its octave which
In a harmonium the intermediate notes between a note and its octave form
The power of a sound from the speaker of a radio is 20 mW. By turning the knob of the volume control, the power of the sound is increased to 400 mW. The power increase in decibels as compared to the original power is
If separation between screen and source is increased by 2% what would be the effect on the intensity
The musical interval between two tones of frequencies 320 Hz and 240 Hz is
In an orchestra, the musical sounds of different instruments are distinguished from one another by which of the following characteristics
It is possible to recognise a person by hearing his voice even if he is hidden behind a wall. This is due to the fact that his voice
