What is the frequency of an instrument if it is played with a tuning fork having a frequency of 386 Hz and it produces a 2 Hz beat frequency, and when played with a 381 Hz tuning fork it produces a beat frequency of 3 Hz? Number Units
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Frequency of first tuning fork = 386 Hz
Beat frequency = 2 Hz
Thus, possible frequencies of instrument = 386+2 or 386-2
= 388 Hz or 384 Hz
Frequency of first tuning fork = 381 Hz
Beat frequency = 3 Hz
Thus, possible frequencies of instrument = 381+3 or 381-3
= 384 Hz or 378 Hz
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