What is the attenuation of sound intensity by 1 cm of fat at 0.8 MHz?(HVT=6.9 CM)
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Q: 7. A dB meter registers 129 dB when placed 1.50 m in front of a loudspeaker. Assuming uniform…
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Q: The acoustic impedance of water is Zwater = 1440000 kg/(m2 s), and that of bone is Zbone = 7800000…
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Q: A 100 milliwatt signal is sent over a 1 km long cable, which attenuates the signal 0.04 dB/meter.…
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Q: seven meters from a spherically symmetric sound source the decibel level is 92 dB, what is the power…
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What is the attenuation of sound intensity by 1 cm of fat at 0.8
MHz?(HVT=6.9 CM)
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- The sound intensity level of 9 m from a large power saw is 89 dB. At what distance(in meters) will the sound be a more tolerable 63 dB?What is the frequency of a pressure wave of wavelength 4.0 m that is traveling at 1250 m/s? O 6.55 kHz O 312.5 Hz © 178 Hz 1.78 kHzThe acoustic impedance of water is Zwater = 1440000 kg/(m2 s), and that of bone is Zbone = 7800000 kg/(m2 s). What proportion of the energy of a sound wave propagating in water will be reflected at the water-bone boundary?
- What is the total sound level produced by the combination of an 80 dB sound and an 85dB sound?The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increase from 23 to 66 dB. What is the ratio of the final sound intensity to the original sound intensity? Number i UnitsThe motion detectors used in our labs are ultrasonic, operating at 25,000 Hz. In a lab room where the temperature is 30 °C, what is the wavelength of these waves? Answer in centimeters. Use 3 sig figs (which is 2 decimal places).
- A sound wave enters the thin tube at P and exits at Q. Assume r = 0.50m and the wavelength is 1.12m. What is the smallest length d that results in constructive interference at Q?Two identical speakers are 3.50 m and 5.20 m from a listener. What is the lowest frequency (n = 1) that would cause constructive interference there? (Hint: v = Af = 343 m/s) (Unit = Hz)(a) A sonar echo returns to a submarine 3.20 s after being emitted. What is the distance to the object creating the echo? (Assume that the submarine is in the ocean, not in fresh water.) in m(b) (Question be is asked as an image, Please look at the image)(c) What is the intensity in watts per meter squared of 89.2 dB sound? in w/m^2
- During ultrasound examination of a patient with spherocytosis, it was noted that 1 MHz signal after reflection from erythrocyte is determined by the detector as having a frequency 400 Hz higher. Find the rate of movement of erythrocyte. The speed of sound in blood is 1500 m/s.A 10 min exposure to 120 dB sound will temporarily shift your threshold of hearing at 1000 Hz from 0 dB up to 28 dB. Ten years of exposure to 92 dB sound will cause a permanent shift to 28 dB. What sound intensities correspond to 28 dB and 92 dB?The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10^−12 W/m^2. Find the distance ddd from the car at which the sound from the stereo can still be discerned. Assume that the windows are rolled down and that each speaker actually produces 0.06 W of sound, as suggested in the last follow-up comment.