Q 17.20: Two speakers, in phase with each other, both put out sound of frequency 260 Hz. A receiver is 2.50 m from one speaker and distance x from the other, where x > 2.50 m. What is the smallest value of x such that the receiver detects maximum destructive interference? Take the speed of sound to be 343 m/s. A 1.32 m B 3.16 m C 3.75 m D 0.66 m E 3.82 m

Q: An office has dimensions of 8 m (L) x 8 m (W) x 3 m (H). There is a door with dimensions of 1 m (W)…

A: Given, Office dimension, L=8mW=8mH=3m Door dimension, W=1mH=2m The sound absorption coefficient,…

Q: 8. Speakers A and B are vibrating in phase. They are directly facing each other, are 8.0 m apart,…

A: Distance between the two speakers is D = 8 mfrequency f = 77 Hzspeed of sound is v = 343 m/s

Q: A sound wave with intensity 2 x 10 -3 W/m2 is perceived to be modestly loud. Your eardrum is 6 mm in…

A: Intensity of sound (I) = 0.002 Wm2Diameter of eardrum (d) = 6 mm

Q: The equation to calculate the decibel level of a sound is B = 10 log(1/lo), where Io = 1 x 10-12…

A: Write the formula for the sound intensity level in dB.

Q: 7. A dB meter registers 128 dB when placed 2.50 m in front of a loudspeaker. Assuming uniform…

A: Sound intensity level at distance r1=2.50 m is β1=128 dB Sound intensity at level r2 is β2=89 dB…

Q: The low-frequency speaker of a stereo set has a surface area of 0.06 m² and produces 1.13 W of…

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Q: A sound wave moves through a medium with density 480kg/m^3 when it encounters a medium with density…

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Q: A bat flying toward a wall emits a 48000-Hz sonar pulse. The pulse is reflected back from the wall…

A: Given: The frequency emitted by the bat is 48000 Hz. The frequency observed by the bat is 48000+640…

Q: A sound wave having a frequency of 253 Hz travels through air at 20 °C. The decibel level at a…

A: Given  Distance r1=32.2 m β1=77.1 dB r2=32.2-14.1=18.1 m

Q: A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves…

A: Calculating the frequncy reflected by the enemey submarine:Note: This frequncy will not be recieved…

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

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Q: A 9000 Hz sound passes through air, through glass, and into a water tank. The wavelength of the…

A: Frequency of sound (f) = 9000 Hz wavelength of sound wave in air = 3.67 cm = 0.0367 mwavelength of…

Q: Sound travels at a speed of v = 1570 m/s in water. While underwater a student hears a f = 1.5 kHz…

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Q: At a rock concert, the sound intensity 1.0 m in front of the bank of loudspeakers is 0.10 W/m2. A…

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Q: Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the…

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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: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies…

A:

Q: two sound sources oscillate in phase with a frequency of 102 Hz. At a point 5.4m from one source and…

A: The expression for path difference of two sound waves at the concerned point is The expression for…

Q: In addition to producing images, ultrasound can be used to heat tissues of the body for therapeutic…

A: We have to determine weather the standing waves are created. Given that, L=0.55 cmfm=0.70 MHz

Q: A concert loudspeaker suspended high off the ground emits 35 W of sound power. A small microphone…

A: The power source,   The distance,

Q: Dolphins rely on echolocation to be able to survive in the ocean. In a 20 °C ocean, a dolphin…

A:

Q: A sound wave having a frequency of 345 Hz travels through air at 20 °C. The decibel level at a…

A: Given: Frequency of sound waves = 345 Hz Decibel level at distance 16.3 m = 86.5 dB Density of air =…

Q: The intensity of sound from a source is measured at two points along a line from the source. The…

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Q: Two speakers emit sound waves of different frequencies as shown in the figure: Speaker A has a power…

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Q: Problem 4. A point source emits sound waves uniformly in all directions. At distance 90.0 m from the…

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Q: A sound wave travels through air at 20 °C. The decibel level at a distance of 19.4 m from the source…

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Q: The higher frequency limit for human hearing is 23.9  kHz. If the air temperature is 12.2 °C, the…

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Q: A person 6.5m from a loudspeaker hears sound with intensity 0.046W/m^2. What is the intensity of the…

A: since the wave is spherical the surface area of the spherical surface is 4*pi*r^2the expression for…

Q: A round speaker emits sound waves uniformly in all direction. At a distance of 40.0m from the…

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Q: 8. A person standing a certain distance from twenty identical loudspeakers is hearing a sound level…

A: Answer :-  given sound level B = 115 dB for 20 identical loudspeaker 4 speaker turn off then level…

Q: A sound wave having a frequency of 266 Hz travels through air at 20 °C. The decibel level at a…

A:

Q: Sound waves travel at roughly 340 m/s at room temperature. The minimum hearing range of a human is…

A: Given: Speed of sound, v=340 m/s  Frequency, f=20 Hz

Q: A hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound…

A: Given:Speed of sound = 1.7 km/sFrequency = 4.2 MHz

Q: A speaker designed to emit spherical sound waves is producing a sound intensity of 8 W/m2 at a…

A: sound intensity of 8 W/m2distance of 1 mwhat would be the intensity of this sound at a distance of…

Q: Two speakers are a distance d = 19.95m apart and emitting in-phase sound of frequency f = 55Hz. The…

A: The distance between the speakers, d=19.95 m The frequency of the sound wave, f=55 Hz The speed of…

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.