Two speakers, s, and s,, are located 0.590 m apart as shown in the figure below. Sally stands 0.910 m away from speaker s,, indicated by the "X" on the figure. The speakers are connected to an adjustable oscillator and always emit the same sound in phase at the same frequency. (Use 343 m/s for the speed of sound in your calculations.) - X S, (a) If Sally cannot hear anything at her location due to destructive interference of sound from the two speakers, what is the lowest possible frequency of sound the speakers emit? Hz (b) The frequency is now changed to 2139 Hz. Sally stands at the same point. Her friend Mark moves speaker s, (along the same axis) to the closest point to speaker s,, but not coinciding with such that Sally hears a maximum of sound intensity. What is the new distance between s, and s,? m
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.
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