Problem 7:   An audio engineer takes decibel readings at distances of r1 = 11 m and r2 = 25 m from a concert stage speaker during a sound check. When he is r1 from the speaker, the engineer registers a decibel level of β1 = 103 dB on his loudness meter. Randomized Variables r1 = 11 m r2 = 25 m β1 = 103 dB Part (a)  What is the intensity of the sound, I1, in watts per square meter, that is measured by the loudness meter when the engineer is a distance of r1 from the speaker?  Part (b)  How much power P, in watts, is coming from the speaker during the sound check at distance r1?  Part (c)  Assuming that the speaker output does not change between the two measurements at r1 and r2, what sound intensity level β2, in decibels, will the loudness meter report when the engineer is at a distance r2 from the speaker?

Q: The low-frequency speaker of a stereo set has a surface area of 0.06 m2 and produces 1 W of…

A: Given :      Surface area, A1  = 0.06 m 2      Power, P = 1 W     Intensity, I = 0.24 Wm2

Q: A sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2. (This is about the…

A:

Q: A typical sound level for a buzzing mosquito is 35 dB, and that of a vacuum cleaner is approximately…

A: Given, sound level for a buzzing mosquito=35dB sound level for vacuum cleaner=65dB

Q: The area of a typical eardrum is about 5.0 x 10 m2 (a) Calculate the sound power (the energy per…

A: We have to use some basic formula here

Q: An audio engineer takes decibel readings at distances of r1 = 15 m and r2 = 22 m from a concert…

A: Given information: Here, β1 is the decibel level at r1 and r2 is an arbitrary point. I0­­ is the…

Q: The softest sound a human ear can hear is at 0 dB (Io = 10-12 W/m2). Sounds above 130 dB cause pain.…

A: Given that  The softest sound a human ear can hear is at 0 dB (Io = 10-12 W/m2). Sounds above 130 dB…

Q: A source of sound (1000 Hz) emits uniformly in all directions. An observer 2 m from the source…

A:

Q: The softest sound a human ear can hear is at 0 dB (Io = 10^-12 W/m²). Sounds above 130 dB cause…

A:

Q: According to the Guinness Book of Records, the anechoic chamber at Orfield Laboratories in…

A: Write the expression for the noise reading. Here, I represents the intensity of noise and I0…

Q: Problem 6:  An audio engineer takes decibel readings at distances of r1 = 14 m and r2 = 25 m from a…

A: Since we have to solve only one question per session, please upload the second question in another…

Q: Given: The intensity level of a sound wave is 75 dB relative to 1µPa. Required: Determine the…

A: Intensity level of sound relative to 1 μPa (I1)=75 dB We need to find the intensity level relative…

Q: A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in…

A:

Q: I The loudness, L, in decibels(dB), is given by the formula L = 10 • log where l = 10-1² W/m². The…

A:

Q: at what distance from the factory (in km) is the intensity level of the whistle sound equal to 12…

A: Given, Factory whistle can be heard up to a distance, D=1.1Km=1100m Threshold of human hearing,…

Q: Problem 1: An audio engineer takes decibel readings at distances of r = 14 m and r, = 22 m from a…

A:

Q: A 57-dB sound wave strikes an eardrum whose area is 5.0x10-5m^2. The intensity of the reference…

A:

Q: 10 m from a speaker sound intensity level 60 dB.  (a) What is the power of the speaker? (b) What is…

A:

Q: The eardrum, which transmits sound vibrations to the sensory organs of the inner ear, lies at the…

A: Given: For adults, the ear canal length (L)= 2.6 cm =2.6 x 10-2m. The speed of sound in the air of…

Q: The intensity of a sound source is described by an inverse-square law only if the source is very…

A: The intensity level of a sound wave is defined by the equation,…

Q: Two students hear the same sound and their eardrums receive the same power from the sound wave. The…

A: Given; Let there be two students A and B.  Both receives the same power from sound wave i.e. PA =…

Q: With the installation of noise suppression materials, the noise level in an auditorium was reduced…

A:

Q: Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low…

A: Sound intensity level = β = 85.1 dB Diameter of the speaker = d = 15.5 cm = 15.5 cm×1 m100 cm=0.155…

Q: Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low…

A: Given:sound intensity level, β= 90.0 dBdiameter of the speaker, D = 12 cm ∴ Radius of speaker, R =…

Q: the output power of a spherically symmetric sound source is 6.0 W. the decibel level at a distance d…

A:

Q: Problem 9:  One day when the speed of sound in air is 343 m/s, a fire truck traveling at vs = 34 m/s…

A: Since you have asked multiple questions in a single request, we would be answering only the first…

Q: The sound level 23.8 m from a loudspeaker is 66.7 dB. What is the rate at which sound energy is…

A:

Q: The following five problems should be calculated on paper, scanned or photographed, and submitted…

A:

Q: A speaker puts out a constant sound with a power of P = 15 milliwatts and frequency fs = 256 Hz.…

A: Power (P) = 0.015 W fs = 256 Hz

Q: The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the…

A: listening position icrease from23 dB to 61 dB

Q: A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in…

A: The ratio of the pressure amplitude of the wave in air to that in the fluid is 0.026

Interference of sound

Seiche

A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.