You and your roommate decide to throw a party. You rig up three speakers with a combined decibel level of 83.5 db. You know that speaker one is 78.0 dB and speaker 2 is 76.0 dB. The sticker on the back of speaker 3 is missing, so you will have to calculate how many decibels it is. How many decibels is the third speaker?

Q: Two speakers (A and B) lie on the y-axis, 4.0m apart. They emit exactly the same 280 Hz tone in…

A: speed of the sound        v = 340 m/s Ferquncy (f) = 280 Hz

Q: A single dog barks at a sound intensity level of β = 88 dB. a. Another dog runs up beside the first…

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Q: Because the human ear is so sensitive to sounds, it can detect very small intensities.  The lower…

A: In this case, the intensity of a sound is given. And we need to calculate the sound level of the…

Q: A quiet home has a sound intensity of approximately 1.0 x 10-9 W/m2. When my french bulldog, Grey,…

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Q: 2. a. An uncomfortably loud sound has an intensity of 0.54 W/m². What is the equivalent value in…

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Q: There are 4 identical dogs barking with identical sound intensity levels of 92 dB as measured by a…

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Q: A sound source that radiates equally in all directions has an intensity of 48 dB at a distance of 23…

A: (a) Let L1 denotes the intensity level at distance r1, I1 denotes the intensity, I0 denotes the…

Q: a. A speaker has sound power (8+ R) watts. Assuming that sound spreads evenly into a spherical…

A: Intensity is defined as power per unit area and power is the rate at which energy is transferred by…

Q: You are trying to overhear a juicy conversation, but from your distance of 15.0 m, it sounds like…

A: Solution: Given that distance 1; R1 = 15 m  whisper 1; dB1 = 2 dB sound levelI is the intensity of…

Q: Ten cars at an intersection are blowing their horns simultaneously, creating a 98 decibel sound in…

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Q: You are trying to overhear a juicy conversation, but from your distance of 21.0 m, it sounds like…

A: Write the expression for sound intensity level.

Q: You are watching a live music show, and at the location of the stage, where all the speakers are…

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Q: You are trying to overhear a juicy conversation. But when you are a distance of 25.0 m away from the…

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Q: You are watching a live music show, and at the location of the stage, where all the speakers are…

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Q: The low-frequency speaker of a stereo set has a surface area of 0.04 m2 and produces 1.13 W of…

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Q: A 4.2 m pipe that is closed at one end emits a 357 Hz wave that has a wavelength of 0.8 m. Determine…

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Q: Speakers A and B are vibrating in phase. They are directly facing each other, are 1.33 m apart, and…

A: distance between the two speakers = 1.33 m frequency = 715 Hz speed of sound = 345 ms

Q: You work at a building site and the noise level has been measured at 95 dB. You need to wear…

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Q: You are at BNA (Nashville Airport) watching commercial airliners take off.  At a distance of 1,357.1…

A: Given L1=1357.1m, β1=71.52dB β2=87.85dB L2=?

Q: arks at a sound intensity level of β = 95 dB. a. Another dog runs up beside the first dog and…

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Q: You are watching a live music show, and at the location of the stage, where all the speakers are…

A: Given that the intensity from the speakers is I0=50.01×10-3W/m2    (1)   The intensity falls as 1/d2…

Q: In a closed-air column, the temperature of the room is 10 °C and using a tuning fork with a…

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Q: How close should you come?

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Q: Two loudspeakers, 4.0 m apart and facing each other, play identical sounds of the same frequency.…

A: We have to find the frequency of the sound. We know that △r=0.25 m

Q: A sound source emits 26.0 W of acoustical power spread equally in all directions. What is the sound…

A: Power emitted by source = P = 26 wDistance of point from source = r = 31.5 m

Q: You have a pipe that is closed at one end. In a 22.0 ℃ room, you find that two of the harmonics…

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Q: You are at BNA (Nashville Airport) watching commercial airliners take off.  At a distance of 1,221.3…

A: Intensity is defined as the power passing per unit areaFor sound waves, intensity is the amount of…

Q: Two 300-watt, 500 Hz sources are 20 m away from an observer. One source moves at a constant…

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Q: A person is 375 m from a bell and a second person is 125 m from the bell. What is the difference in…

A: Question-1) When a bell rings, it produces sound waves that spread out in all directions from the…

Q: A speaker produces sound with a power of 9.3 W. What is the intensity level of the sound 20 m away…

A: The intensity of sound is, I=PA   =9.34π202  =1.85×10-3 W/m2

Q: Speakers A and B are vibrating in phase. They are directly facing each other, are 6.07 m apart, and…

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Q: fundamental frequency of a wooden flute is 200 Hz.  The flute is a fully open cylindrical tube. If…

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Q: You are trying to overhear a juicy conversation, but from your distance of 21.0 m, it sounds like…

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Q: The horn in your car produces sound with a frequency of 80 Hz. While sitting at rest, you honk your…

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Q: A.) I start with a bar 1.82 meters long. How long must I make a second bar to be a perfect fifth…

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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.