A harvest mouse can detect sounds below the threshold of human hearing, as quiet as -10 dB. Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby. A very gentle breeze causes a leaf 1.5 m from your head to rustle, generating a faint sound right at the limit of your ability to hear it. The sound of the rustling leaf is also right at the threshold of hearing of the harvest mouse. How far is the harvest mouse from the leaf?

Q: I blow into the lid of an empty bottle to make music. The bottle is 0.27 m deep and sound velocity…

A: Given, Length of bottle l = 0.27 m Velocity of sound v = 331 m/s   We know the expression frequency…

Q: Your teacher speaks with a sound intensity of 1.5×10−71.5×10−7 W/m2. What is the intensity level in…

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Q: ) The threshold of hearing is quoted as 1.0 × 10 W m ?. Explain what is meant by the threshold…

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Q: Suppose the purr of a cat has a sound intensity that is 240 times greater than the threshold level.…

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Q: e 30 m away is 100 dB. What is the sound intensity in W/m^

A: Given:- The distance d = 30 m  The level of sound of jet airplane  L = 100 dB  Find:-  The Sound…

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

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Q: A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity…

A: The sound intensity level experienced by the crew member,

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: The African cicada is the world’s loudest insect, producing a sound intensity level of 107 dB at a…

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Q: A cicada's mating call reaches 105 dB at a distance of 1.00 m from the insect. Calculate the decibel…

A: Here, for the intensity calculation we use the formula, I (dB) = 10 log[I/Io] Corresponding sound…

Q: The intensity of a sound level of 100 db is equal to knowing that the threshold of hearing is 10-12…

A: Given :     Sound level, β = 100 dB     Threshold of hearing, Io = 1×10-12 W m-2 Determine the…

Q: (20.7) The energy E of a system of three independent harmonic oscillators is given by 1 E = (Nx + ½…

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Q: The power of the sound produced by the sound source is 10 mW. The observer is at a distance of 2.5 m…

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Q: A typical adult ear has a surface area of 2.1×10-3m2. The sound intensity during a normal…

A: Area, A = 2.1×10-3 m²Intensity, I = 3.2×10-6 W/m²Power, P = ?

Q: The sound intensity near a jet engine is 120 dB. Assuming an attenuation coefficient in air of x =…

A: There are two types of waves, namely longitudinal and transverse. Transverse waves are those which…

Q: The table gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound…

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Q: What is the decibel level of a sound that has an intensity of 87 x 10-5 W/m?? Assume the standard dB…

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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: Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the…

A: Given:The diameter of the ear is .The intensity of the sound is .

Q: You like to listen to music at a sound intensity of 3.3×10−53.3×10−5 W/m2. What is the intensity…

A: Given: The intensity of the sound is 3.3x10-5 W/m2. The intensity of sound for threshold hearing is…

Q: The sound intensity 9 m from an isotropically radiating point source is 0.78 W/m². What is the power…

A: Since the point is 9 m from the point source,  so, the  area of sphere covered is A =πr2  ⇒4×π×92 =…

Q: Suppose the purr of a cat has a sound intensity that is 370 times areater than the threshold level.…

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Q: intensity of another sound

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

A: Given that First Intensity I1 = 0.79 W/m2 Second intensity I2 = (1.18)(0.79) W/m2 = 1.18I1 Diameter…

Q: A sound source creates a sound intensity at a certain distance. If the sound intensity is increase…

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Q: A 60 man choir sings with the sound intensity of 70 dB in a 12 m distance from the choir. a) What is…

A: Given information: Here, β is the sound level at r1 distance, r2 is the distance at which the…

Q: When you "crack" a knuckle, you suddenly widen the knuckle cavity, allowing more volume for the…

A: Given data: distance from kunckle to ear r = 0.26 m sound level β=65dB

Q: What is the ratio in intensity of two sounds, one of which is 18 dB louder than the other? 45 0 5 50…

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

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Q: A 60-dB sound wave strikes an eardrum whose area is 5.0 x 105 m². The intensity of the reference…

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

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Q: W 1. (a) What is the intensity of a sound that has a level 7.5 dB lower than a 4.10 9 Intensity: W…

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Q: What is the decibel level of a sound that has an intensity of 10.4 x 10-5 W/m2? Assume the…

A: The sound intensity is The reference sound intensity is Find:Sound level for given sound intensity.

Q: A noise has an intensity of 2.4×10-8 W/m2. If the threshold of human hearing is I0 = 1.0×10-12 W/m2,…

A: Given data: Intensity (I) = 2.4 ×10-8 W/m2 Threshold hearing (I0) = 1.0×10-12 W/m2 Required: The…

Q: 12 gives the loudness of sound L (in dB) based on the intensity of sound I (in W/m²). The value I =…

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Q: A detector is moved from a position 2.0 cm to a position 16 cm from an ultrasound source. What is…

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Q: threshold of hearing has an intensity of 10- 12 W/m^2 (a sound level of 0Db). how much more intense…

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Q: The human audible range is from 20 Hz to 20kHz sound of intensity 120 dB; beyond which is already…

A: We know that:- Let threshold of hearing of human ear is I0 Given the intensity level β=120 dB The…

Q: source of sound changes, so that it outputs half of its original power.  If the distance between you…

A: The correct answer is (c) 1/2. Sound intensity is measured in units of decibels (dB) and is related…