Two side-by-side (virtually no separation) speakers are wired such that they emit a single-frequency sound out of phase with each other by radians, and radially outward. The tone heard from the two speakers combined has a decibel level of 36 dB.
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.
Two side-by-side (virtually no separation) speakers are wired such that they emit a single-frequency sound out of phase with each other by radians, and radially outward. The tone heard from the two speakers combined has a decibel level of 36 dB.
a. If one of the speakers is suddenly disconnected, what is the decibel level heard?
b. If both speakers are connected and the listener moves to a distance from the speakers that is 5 times greater than where the 36dB sound was heard, what is the new decibel level heard? Assume that the waves travel radially from the speakers.
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