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 speakers emit identical sinusoidal waves. The speakers are placed 8.9 m apart. You
are standing at position A and heard a loud pitch when the speakers are both playing a
697 Hz tone. You start walk towards position B, directly in front of speaker 1, along a line
parallel to the two speakers. Then, you turn right and keep walking towards point Ca
distance of 10.8 m as shown in the figure. The temperature of the air is at 50F. [Answer
in 3 significant figures]
Speaker 1
8.9 m
Speaker 2
2.7 m
4.5 m
5.95 m
B
A
i Loud
10.8 m
C
a) i
What is the wavelength of the sound?
b)
Are the two speakers in phase or out of phase?
c)
Both speakers emit the same amount of output power. What is the output
power for the speaker if the intensity sound level received at position C (a loud spot)
when both speakers are on is 90.1 dB?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F828b7219-4ca3-4b63-811d-386a3db64776%2F4561b76a-cea2-4a88-997e-7d8502e6508d%2Fnvi8kaw7_processed.png&w=3840&q=75)
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