Question

A sound wave traveling in 20ºC air has a pressure amplitude of 0.5 Pa. What is the intensity of the wave?

Answer #1

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13. The pressure amplitude of a 500.0 Hz sound wave is 2.0 x
10-2 Pa. The bulk modulus of air is 1.42 x 105 Pa and the density
of the air is 1.2 kg/m3.
Find: (a) The speed of sound in air. (344.0 m/s)
(b) The displacement amplitude.
(c) The intensity of the wave.
(d) The intensity level of sound.

An experimenter wishes to generate in air a sound wave that has
a displacement amplitude of 4.50 10-6 m. The pressure amplitude is
to be limited to 0.810 Pa. What is the minimum wavelength the sound
wave can have? (Take the equilibrium density of air to be ρ = 1.20
kg/m3 and assume the speed of sound in air is v = 343 m/s.)

A rather typical sound wave has a pressure amplitude of 2×10-2
Pa and a frequency of 103Hz. Assuming that the wave is a plane wave
propagating to the right in air at 22°C and 1.01×105 Pa:a) Write
the function describing this wave. Give numerical values for the
circular frequency ω, the wave number k, and the amplitude. b) What
is the amplitude of the particle velocity in this wave?c) What is
the maximum percentage change in the air density due...

A sound wave of frequency 349 Hz has an intensity of 4.03
?W/m2. What is the amplitude of the air
oscillations caused by this wave? (Take the speed of sound to be
343 m/s, and the density of air to be 1.21 kg/m3.)

A sound wave has an intensity level of 123.5 dB in air. The
density of air at 20.0°C is ρ = 1.20 kg/m3 (see Table
9.1). The speed of sound in air at 20.0°C is v = 343 m/s.
What maximum force does this wave exert on an eardrum of area
0.590 × 10−4 m2? in in mN

Determine the amplitude of the displacement for sound with an
intensity of 120 dB, which corresponds to the threshold of pain for
the human ear. The sound has a frequency of 1 kHz. The bulk modulus
of air is 1.42x10 5 Pa and the speed of sound in air is 340 m/s

For a 1000Hz spherical wave in air with a sound pressure level
of 45 dB re 20\muPa, find a) the acoustic particle velocity
amplitude and b) the amplitude of the particle displacement for
r=0.1m and r=100m. Please include calculations of both the radius.
There should be two answers for part a and b

A sound wave is traveling in warm air when it hits a layer of
cold, dense air. If the sound wave hits the cold air interface at
an angle of 20 ?, what is the angle of refraction? Assume that the
cold air temperature is -10 ?C and the warm air temperature is +20
?C. The speed of sound as a function of temperature can be
approximated by v=(331+0.60T)m/s, where T is in ?C. Express your
answer to two significant...

5. Two sound waves, A and B, are identical except that sound
wave A has an
amplitude that is 2 times the amplitude of sound wave B. Which
sound wave has the greater
intensity, and by what factor?
7. String A and string B have the same mass per unit length, but
string A is
placed under twice the tension as string B. Waves generated in
string A and string B have
the same frequency. Which string has the longer...

A sound wave begins traveling through a thin metal rod at one
end with a speed that is 15 times the speed of sound in air. If an
observer at the other end of the rod hears the sound twice, one
from the sound traveling through the rod and one from the sound
traveling through the air, with a time delay of 0.12 ?, how long is
the rod? The speed of sound in air is 343 ?/?.

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