15.21 Figure 15.3 shows a communication system. What is the output power when the input signal is of 1.01mW? (gain in dB = 10 log10 (Po /Pi). 10 db 20 db Input Loss 2dB km 1 Output 5.0 km Amplifier Amplifier

Q: What is the frequency of the sound wave in the air when the temperature is 350 K and the wavelength…

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Q: what length of open pipe will produce a frequency of 1200 Hz as it first overtone on a day when the…

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Q: Calculate the sound pressure level for a sound wave having an effective pressure of 3.5N/m?. Use…

A: The sound pressure level is measured in units of decibels (dB) and is calculated using the following…

Q: What is the sound level (in decibels) of a sound whose intensity is 7.5 x 108 w/m2? 6.7 dB 7.5 dB 80…

A: Given : sound intensity , I = 7.5 × 10-8 W/m2

Q: 53. A closed pipe 3 ft long, compute the 6th harmonic if air temperature is 80°F. a.627.92 Hz b.…

A: Type of pipe - CLOSED PIPE. Length l = 3ft = 0.914 m. 6th harmonic. Temperature T = 80deg F.…

Q: 8. The first overtone of a stretched wire of a given length is 320 Hz. The first harmonic is D. 160…

A: Hi. as you have posted multiple questions and have not specified which question needs to be solved,…

Q: Given that the threshold of hearing is 10-16 W/cm2, the intensity of a sound wave with a power of…

A: Intensity of sound wave (I) = 10-12 Wcm2Threshold of hearing (Io) = 10-16 Wcm2

Q: The speed of sound in air is 340 m/s, and the density of air is 1.2 kg/m^3. What is the frequency…

A: Given : v = 340 m/s d = 1.2 kg/m3 A = 30 micrometer = 30 x 10-6 m P = 16.50 Pa

Q: A bat can detect small objects, such as an insect, whose size is approximately equal to one…

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Q: what frequency corresponds the wavelength of 4.3 [m]. If the speed of sound is 343 [m / s

A: Write the given values of the problem- Wavelength(λ) λ=4.3 mSpeed of sound(v)v=343 ms

Q: The sound level at a distance d347 m from a loudspeaker is 70 dB. What is the power (in Watt) at…

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Q: A vibrating tuning fork is held above a glass cylinder filled to the top with water. The water level…

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Q: Loudness (L), in decibels (dB), of a sound of intensity I is defined to be L=10log(I)/(I_(0)) ,…

A: Let IT denotes the intensity of the trombone and LT denotes the loudness of the trombone. Using the…

Q: 9) You drop a ringing alarm off a cliff; as it accelerates towards the ground, what happens to the…

A: Answer-> (D) the frequency is lower than the original frequency and decreasing as it falls…

Q: A piano tuner creates an 880.0 Hz tone. When he plucks a piano string, the two waves create a beat…

A: According to question we need to find lowest value of second frequency?

Q: A very loud train whistle has an acoustic power output of 100 W. If the sound energy spreads out…

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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: A sound source is designed to produce a 1.0 W/m2 sound intensity from a distance of 20 m. What…

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Q: 10-9. The following noise spectrum was obtained from a jet aircraft flying overhead at an altitude…

A: Your answer is 108dB

Q: The audible range for humans is ________. Choose one answer.   a. 20-20,000 Hz     b. less than 300…

A: Required:   Frequency range of audible sound for humans

Q: Find the wavelength of air at 20°C of an 19 Hz sound wave. Table 15-1 Speed of Sound In Varlous…

A: Sound waves are longitudinal waves. This implies that the direction of propagation of the wave is…

Q: A 2.25-mm-long pipe has one end open. Among its possible standing-wave frequencies is 345 HzHz; the…

A: The units are repeated twice. We will solve the problem with  length 2.25 m and the frequencies 345…

Q: An organ pipe with length L= 2.00m is closed at one end. Compute the wavelengths and frequencies of…

A: We know that frequency  f=v/λ

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: 56. The intensity of a speaker is 80 dB at 10 meters. Calculate the intensity of the speaker if the…

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Q: pipe length[cm]

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Q: A low noise 3  stage cascaded power amplifier is to be used in a typical low noise communication…

A: Write the given values of this problem: G1=31 dBBandwidth(B.W)=1.5 kHzG2=20 dBTe2=484 deg KG3=13…

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

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

Q: A microphone delivers 36 mW to the 300 ohm input of an amplifier. The maximum power for a 16 ohm…

A: Given: the microphone delivers 36 mW  300 ohm input of an amplifier The maximum power for a 16-ohm…

Q: Your experiments on a particular insulator indicate that at 20°C, the average speed of sound in the…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: What is the length of an closed-pipe resonator with a fundamental frequency of 400.0Hz? (Assume the…

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Q: What is the resultant sound intensity level when a 82 dB sound and a 87 dB sound are heard…

A: Let I1 = 82dB I2 = 87 dB.

Q: A sound wave of frequency 880 Hz and power 50.0 W creates loudness at a sound meter of 40.0…

A: In this question we have to find the increase in sound level. Please give positive feedback if the…

Q: A guitar string produces a musical note with a wavelength of 78.0 cm. If the speed of the sound in…

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Q: A submarine is lying motionless underwater and detects an underwater sound coming from a moving…

A: The Doppler's effect is given by  f' =v - vov - vsf where, f is the true frequency, v is the…

Q: A sound wave in air has pressure amplitude equal to 4×10^-3 n/m^2. Calculate  the displacement…

A: Given, Pressure amplitude, P= 4×10-3 N/m2, and frequency, f=10 kHz=10000 Hz.

Q: A travelling sinusoidal wave has this equation :   y(x,t) = 0.0450 m sin (25.12 m-1 x - 37.68 s-1…

A: Given wave equation: yx,t=0.0450sin25.12x-37.68t-0.523 Comparing above equation with…

Q: A 268.39-Hz tuning fork is held above a closed pipe. Find the wavelength between the resonances when…

A: Given,  Frequency = 268.39 Hz  Speed of sound in air , V = 343 m/s

Q: The sound level at a distance d=34 m from a loudspeaker is 70 dB. What is the power (in Watt) at…

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Q: The sound pressure amplitude associated with a 120 db loudness is Group of answer choices a.…

A: Sound loudness (β) = 120 dB

Q: When listening to tuning forks of frequency 255.99 kHz and 256 KHz, one hears the following number…

A: Ans. (a) 10   for given frequencies f1 and f2 the beat frequency is given byfb=f1-f2

Q: A bat emits a sound whose frequency is 81.8 kHz. The speed of sound in air at 20.0 oC is 343 m/s.…

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Q: Acceptable noise level for human ear:  A) > 85 db B) = 85 db C) < 85 db D) None of the above

A: The loudness of sound is measured by the sound pressure level. When the volume or loudness is…

Q: A speaker produces 1W of acoustical power. If the speaker projects sound uniformly in all…

A: Given data The acoustical power of the speaker is given as P = 1 W. The loudness of the sound is…

Q: A sound wave is traveling in seawater, where the adiabatic bulk modulus and density are 2.31 × 109…

A: Given  Density = 1025 kg/m3 Bulk modulas (B) = 2.31×109  Pa Wavelength = 3.22 m f1= 440 Hz

Q: The power output of a certain public address speaker is 3.7 W.  Suppose it broadcasts equally in all…

A: