A pass by train noise level of 79 dB was measured at 50 feet from the tracks. What will you anticipate the noise level from that same train on a residential community located 200 feet from the tracks

Q: Compare the apparent frequencies of a 2550 Hz source moving away from you at 25 m/s when you are…

A: Given: The frequency of the source is 2550 Hz. The speed of the source moving away is 25 m/s. The…

Q: What is the decibel level a person hears from a 16 W speaker 100 m away?

A:

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

A: Given - Sound level, β = 90 dB Diameter of speaker , d = 12 cm =0.12 m Efficiency of speaker , η =…

Q: A piano tuner using a 264-Hz tuning fork hears 4 beats per second. What are two possible frequencies…

A: The frequency of tuning fork,

Q: A brand of earplugs reduces the sound intensity level by 27 dB. By what factor do these earplugs…

A:

Q: A vibrating sonometer wire emits a note which gives a beat frequency of 6Hz when sounded in unison…

A:

Q: As a firefighter, you find yourself at the bottom of a burning high rise. A resident is trapped on a…

A: In this question we have to find the loudness of the horn so that the residents are able to hear it.…

Q: An outside loudspeaker emits sound waves with a power output of 100 W. Calculate the intensity level…

A:

Q: At Zion National Park a loud shout produces an echo 1.50 s later from a colorful sandstone cliff.…

A: Given: Time taken t = 1.50 s Speed of sound in air V = 343 m/s We have to calculate how far is the…

Q: The noise level in an empty examination hall (ambient noise) is 40 dB. When 100 students are writing…

A:

Q: A rock band plays at a 72 dB sound level. How many times greater is the intensity from another rock…

A:

Q: he noise a   lawn mower produces is  80 dB. How much noise is from 10 identical lawn mowers?

A: Given: The sound level of the lawnmower is 80 dB. The number of identical lawnmowers is 10.

Q: The intensity level of a sound coming from a certain TV is 80 dB, while from a vacuum cleaner is 85…

A:

Q: An ambulance siren emits a sound wave with a frequency of 350 Hz. If the ambulance is at rest and a…

A:

Q: A train passes by a little boy at the depot.As it moves away from the boy at 65m/s, the whistle…

A:

Q: A speaker produces 100 (w) of power, If the speaker projects sound uniformly into the forward…

A: Given: The power of the source is 100 W. The distance of the point from the source is 4 m.

Q: Chapter12-002 In general, sound is conducted fastest through gases. liquids. solids. a vacuum.

A: Sound travel faster through solid.

Q: A developer has proposed putting a shopping mall next to a suburban residential area in Serdang. The…

A:

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 2 identical lawn mowers?

A: Given: β1=80 dB

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: The ability to hear a "pin drop" is the sign of sensitive hearing. Suppose a 0.50 g pin is dropped…

A:

Q: The sound level measured in a room by a person watching a movie on a home theater system varies from…

A: Given that: β1=45 dBβ2=75 dB   It is required to determine the loudness of the latter sound.

Q: The sound intensity level of 9 m from a large power saw is 89 dB. At what distance(in meters) will…

A: (given) Sound intensity level at distance (r1)= 9 m Power saw β1 = 89 dB More tolerable intensity…

Q: How far should you stand away from a sound source that generates and 85-W power to cause damage to…

A: Given Power of sound source is P=85 W Maximum hearing intensity of Ear is I= 1 W/m2

Q: The ambulance siren emits a sound with a frequency of 450 Hz. What is the wavelength of the sound?…

A: frequency of siren when stationery, fs= 450Hz Speed of sound in air = 340 m/s Vehicle speed ( moving…

Q: A speaker produces 100 (w) of power, If the speaker projects sound uniformly into the forward…

A: Given that, Power is P = 100 W Distance from the speaker is r = 3 m

Q: The rupture of the eardrum occurs at a sound intensity level of 150dB. Determine the intensity, the…

A:

Q: Fifty metres from an alarm the sound level is 103 dB. To what sound intensity does this correspond…

A: Given, Loudness,

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 3 identical lawn mowers?

A: Given  Noise produced by one mower =80dB no of identical mowers x=3

Q: A 66 Watt speaker radiates uniformly in all directions. Calculate the relative intensity of the…

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Q: A 1000-Hz sound wave is  found to have a wavelength  of 38 cm. What is the  temperature of the air…

A:

Q: The Human Voice. The human vocal tract is a pipe that extends about 17 cm from the lips to the vocal…

A: Frequency of standing wave in an stopped pipe is f=nv4L Here, f is the frequency of nth harmonic ,L…

Q: A point source emits 58.7 W of sound isotropically. A small microphone intercepts the sound in an…

A:

Q: Compare the apparent frequencies of a 2550 Hz source moving away from you at 25 m/s and when you are…

A: From the question it is given that:  Orignal frequency = f = 2550 Hz Case 1: when source is moving…

Q: The washing machine is running at 100 dB noise at the same time as the ghetto. Confirm 100 dB in the…

A: Given: The intensity level of noise produced by washing machine, L1 = 100 db The intensity level of…

Q: A train sounds its horn with an intensity level of 51.0 dB as it approaches a train station. An…

A:

Q: Assuming the speed of sound at a certain temperature is 343m/s. Compute the distance of the source…

A: Given data: Speed of sound (v) = 343 m/s Time taken to hear a echo (t) = 3.00 s Required: Distance…

Q: A stereo amplifier is rated at 225 W output at 1000 Hz. The power output drops by 12 dB at 15 kHz.…

A: Given: The power of amplifier is P=225 W. The frequency is f=1000 Hz. The drop in power output is…

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

A: Given Data: The sound intensity level is, B = 90 dB. The diameter is, D = 12 cm. The efficiency of…

Q: The sound level measured in a room by a person watching a movie on a home theater system varies from…

A: Given data The first sound level is given as dB1 = 45 dB. The second sound level is given as dB2 =…

Wave Motion

A wave motion is defined as the propagation of disturbances or transfer of energy and momentum from the state of rest or equilibrium to another point in a medium without any actual transfer of matter between them. In a simple explanation, it is the propagation of energy through a medium that is produced due to the repeated vibrations of the particles. Common things we see day to day like waves on water oscillation of a pendulum or bell, light wave, and all the subatomic particles exhibiting wavelike properties. The propagation of waves depends on the medium and their properties. The wave function is the disturbance that produces waves as a function of time. This disturbance oscillates periodically with a fixed frequency and wavelength. There are linear wave motion and non-linear wave motion based on their propagation, motion, and time period where linear wave motion is like sinusoidal waves and non-linear wave motion like a wave motion that gets interrupted in the middle of their propagation.