Sound (10)

Reflection of Sound Waves; echoes: their use; simple numerical problems on echoes.

Natural vibrations, Damped vibrations, Forced vibrations and Resonance - a special case of forced vibrations.

Loudness, pitch and quality of sound

Displacement distance graph of two sound waves A and B
The human ear can detect continuous sounds in the frequency range
Two waves of the same pitch have amplitudes in the ratio 1:3
A man playing a flute is able to produce notes of different frequencies
Define resonant vibrations
It is observed that during march-past we hear a base drum
A sound wave travelling in water has wavelength 0.4 m
What are acoustically measurable quantities related to pitch and loudness
When a tuning fork [vibrating] is held close to ear
A man standing in front of a vertical cliff fires a gun
What do you understand by free vibrations of a body
An enemy plane is at a distance of 300 km from a radar
How is the frequency of a stretched string related to
The diagram above shows a wire stretched over a sonometer
A person is standing at the sea shore. An observer on the ship which is anchored
Loudness of the sound heard
What are damped vibrations
The ratio of amplitude of two waves is 3 : 4. What is the ratio of their
State two ways by which the frequency of transverse vibrations
What is meant by noise pollution
A wire of length 80 cm has a frequency of 256 Hz
Name the waves used for echo depth sounding
What is an echo
Name the phenomenon involved in tuning a radio set to a particular station