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Which of the following graphs plots the sound level β of a sound wave as a...
13. One way to represent sounds is in terms of a sound spectrum, which plots magnitude (or power or amplitude) as a function of frequency. Another way to represent sound is to plot_ _ as a function of (a) time; frequency (b) time; pressure (c) pressure; time (d) none of the above 14. True or False. The auditory filter is, on a linear scale, wider at 1500 Hz than at 4000 Hz. 15. Imagine you hear a sound composed of...
Calculate the acoustic sound intensity level in decibels for a sound wave travelling in air at 10 degree C and having a pressure amplitude of 0.656 Pa.
4. The variation of pressure in a sound wave is described by the following function p-17 sin (6.50x-1 500t + π/2) Nm? where x is in meters and t is in seconds. (a) By comparing to the general form of the functions describing sound waves in Equation 1.6 and in Exercise 1.4, determine the amplitude of the pressure variations, the angular wave number, the angular frequency and the phase angle, giving the correct units for each. Determine (b) the amplitude...
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. The speed of sound in air at 20.0°C is v = 343 m/s What is the pressure amplitude of the wave? in N/m2
. A sound wave at the 7 decibel level of loudness has what intensity? If the amplitude of this wave were doubled, what would be the 1oudness in decibels? Explain how you would compute the combined loudness level of two sounds which are individually at B dB and β2 dB
4. Your ears detect a sound wave with a frequency of 315 Hz and a sound intensity level of 80 dB. It originated in a vibrating string with a length of 1.9 meters. A) Waves can be longitudinal or transverse. What is the difference between these two kinds of waves? B) This question has one longitudinal wave and one transverse wave. Identify them. C) Recall that the sound you hear from a string is the fundamental frequency, which has a...
A plane wave in fresh water with a sound pressure level of 95 dB is normally incident on a region of Mercury What is the pressure reflection coefficient? What is the sound pressure level of the transmitted wave in dB? b. What is the intensity transmission coefficient? c. A plane wave in fresh water with a sound pressure level of 95 dB is normally incident on a region of Mercury What is the pressure reflection coefficient? What is the sound...
A 85.0-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0°C is 1.20 kg/m3. Speed of sound in air at 20.0°C is 343 m/s. What is the displacement amplitude of a 85.0-Hz sound wave?
Which of the following is NOT a property of sound waves? A. The speed of sound waves in air depends on the temperature of the air B. The pitch of a sound wave is closely related to its frequency C. The loudness of a sound wave is related to its amplitude and frequency D. Sound waves can travel through empty space
A 72.0-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0°C is 1.20 kg/m3. Speed of sound in air at 20.0°C is 343 m/s. What is the displacement amplitude of a 72.0-Hz sound wave? Answer in nm