Figure 17-32 shows the output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 343 m/s through air with a uniform density of 1.21 kg/m 3 . The vertical axis scale is set by ▵ p s = 4.0 mPa. If the displacement function of the wave is s(x, t ) = s m cos (kx − ωt), what are (a) s m , (b) k , and (c) ω ? The air is then cooled so that its density is 1.35 kg/m 3 and the speed of a sound wave through it is 320 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d) s m , (e) k , and (f) ω ? Figure 17-32 Problem 14.
Figure 17-32 shows the output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 343 m/s through air with a uniform density of 1.21 kg/m 3 . The vertical axis scale is set by ▵ p s = 4.0 mPa. If the displacement function of the wave is s(x, t ) = s m cos (kx − ωt), what are (a) s m , (b) k , and (c) ω ? The air is then cooled so that its density is 1.35 kg/m 3 and the speed of a sound wave through it is 320 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d) s m , (e) k , and (f) ω ? Figure 17-32 Problem 14.
Figure 17-32 shows the output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 343 m/s through air with a uniform density of 1.21 kg/m3. The vertical axis scale is set by ▵ps = 4.0 mPa. If the displacement function of the wave is s(x, t) = sm cos(kx − ωt), what are (a) sm, (b) k, and (c) ω? The air is then cooled so that its density is 1.35 kg/m3 and the speed of a sound wave through it is 320 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d) sm, (e) k, and (f) ω?
A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in the fluid is 0.410 times that in air and the frequency is the same as for the wave in air, what will be the ratio of the pressure amplitude of the wave in air to that in the fluid? Approximate the fluid as having the same values of density and speed of sound as water. Speed of sound in dry air (20.0°C, 1.00 atm) is 343 m/s, density of dry air (at STP) is 1.29 kg/m3, density of water is 1000 kg/m3, and speed of sound in water is 1493 m/s.
For a 171Hz plane traveling wave in air with a sound pressure level of 40 dB re 20 pPa, find (a)the acoustic pressure amplitude, (b) the intensity, (c)the acoustic particle speed amplitude, (d) the acoustic density amplitude, (e) the particle displacement amplitude
If a human ear canal can be thought of as resembling an organ pipe, closed at one end, that resonates at a fundamental frequency of 3.0 x 103 Hz, what is the length of the canal? Use a normal body temperature of 37.0°C for your determination of the speed of sound in the canal.
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