(I) A certain dog whistle operates at 23.5 kHz, while another(brand X) operates at an unknown frequency. If humanscan hear neither whistle when played separately, but a shrillwhine of frequency 5000 Hz occurs when they are playedsimultaneously, estimate the operating frequency of brand X.

Q: (1) The noise level from a sewing machine was found to be 96 dB (lincar) at a distance of 1 metre.…

A: Note: as per Bartleby's rule, only one question should be answered. So submit the other questions…

Q: How far away could you still detect a sound source with 100 mW of acoustic power released for 0.010…

A: The sound pressure level (SPL) of 30 dB re 20 µPa means that the sound has a pressure that is 30 dB…

Q: (c) Two people are 150 m apart and a speaker is placed some distance between them (assume all in a…

A: Given: sound intensity level heard by the first person β1=65 dB sound intensity level heard by the…

Q: A stretched sonometer wire is in unison with a tuning fork- when the length is decreased by 1%, 3…

A: Given Data Let the intial length of wire is:l1 The final resonating length is:l2=l1+1%l1 The beat…

Q: (c) Two people are 150 m apart and a speaker is placed some distance between them (assume all in a…

A:

Q: (II) Two violin strings are tuned to the same frequency, 294 Hz. The tension in one string is then…

A:

Q: A loudspeaker is placed near the open end of a pipe length 87 cm closed at its other end. Calculate…

A:

Q: 19-4.21) Suppose that a rustling leaf generates 8.4 dB of sound. Find the sound level from a tree…

A: The sound generated by rustling leaf is B=8.4 dB.Number of rustling leaves are n=2.71x105.The…

Q: A siren has a sound power of 4 + 9 watts. Given Iref = 10-12 W/m² and at distance, r = 100 x 4…

A: Given information: The power emitted by the source (P) = 4+9 watts = 13 watts The reference…

Q: How long must a flute be in order to have a fundamental frequency of 262 Hz (this frequency…

A: It is given that, f=262 HzT=20oC

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

A:

Q: A stretched sonometer wire is in unison with a tuning fork, when the length of the wire is increased…

A: To find- Frequency of the tuning fork=? Given data- L1L2=100105L2=1.05…

Q: What is the wavelength of the sound emitted by an airplane flying at an elevation of 12192 meters…

A:

Q: The lowest frequency a certain sound receiver can detect is 760 Hz. If the receiver detects a…

A: The given data are: Δf=4 Hzf=762 Hz Here, Δf denotes the beats per second and f denotes the…

Q: For hearing a distinct echo, the minimum distance of the obstacle from the source of sound should be…

A:

Q: (II) Two automobiles are equipped with the same singlefrequency horn. When one is at rest and the…

A: Speed of source, vs=18 m/s   Speed of sound, v=343 m/s   Beat frequency, ∆f=4.5 Hz

Q: (d) Two people are speaking at the same time, with the voice of one of them slightly higher than the…

A: Pitch is that property of sound that makes it possible to judge higher or lower related to other.…

Q: The fundamental frequency of a pipe closed at one end is unison with the third overtone of an open…

A: We need to compute- Ratio of their lengths of air column=? The data given as- Fundamental frequency…

Q: A dB meter registered 125 dB when it was placed 3.90 m in front of a speaker. (i)  Calculate the…

A:

Q: (II) A guitar string produces 3 beats /s when sounded witha 350-Hz tuning fork and 8 beats/s when…

A: A beat is a difference in frequencies of two overlapping sounds. Here, the guitar string produces…

Q: A dB meter registered 125 dB when it was placed 3.90 m in front of a speaker. (ii)  Calculate the…

A: Calculate the sound intensity for 125 dB. dB=10logI1I0125=10logI110-12I1=3.16

Q: Calculate the lowest resonant frequency for a brick partition 150 mm thick, 6 m by 3 m in an area…

A: The lowest resonant frequency can be determined as, Here, vL, b, l, and h represent the…

Q: (II) Determine the fundamental and first overtone frequencies when you are in a 9.0-m-long hallway…

A: The expression for find fundamental frequency of first harmonics is fn=nv2L Substitute values in the…

Q: (3) A harmonica makes sounds when a reed inside of it vibrates back and forth. We can consider this…

A: The sounds produced from a harmonica are a result of standing waves being produced on the reed…

Q: (III) The human ear canal is approximately 2.5 cm long. Itis open to the outside and is closed at…

A: Given: The human ear canal is approximately 2.5 cm long. It is open to the outside and is closed at…

Q: (II) Approximately what are the intensities of the first twoovertones of a violin compared to the…

A: The intensity of the sound wave in terms of frequency of the wave is, I=2π2vρf2A2 Here,ρ is the…

Q: One musical instrument is set to produce sound of varying fundamental frequencies whose maximum…

A: Ls=Sound level of single instrument=45 dBn=Number of instrument=30I=Intensity of soundI0=Threshold…

Q: 2a) A certain pipe has a fundamental frequency of 234 Hz. Using 343 m/s as the speed of sound, what…

A:

Q: On a day when the speed of sound is 344 m/s, the fundamental frequencyof a particular stopped organ…

A: Given, Speed of sound is 344 m/s and fundamental frequency is 220 Hz

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.