(b) Consider the speaker set-up in the previous question. Each speaker emits a frequency of 6.6 102 Hz in phase with the other. The listener is seated directly in front of one speaker, 1.6 m away. The speakers are 2.4 m away from each other. How many extra wavelengths are needed for sound to get from speaker 2 to the listener? Take the speed of sound in air to be 3.4 102 m/s. Extra wavelengths |x,-x2|/A:| (c) What kind of interference, if any, does the listener in the previous question experience? There is not enough information to tell Destructive interference Constructive interference No interference

(c) Two identical speakers are placed at the positions X and Y, as shown in the following figure. The separation distance between the positions X and Y is 4.9 m. When both speakers are working in phase under a frequency of 159 Hz, calculate the minimum distances of YZ and XZ, such that destructive interference would occur at the position Z. The speed of sound is 344 m/s. Hint: XY>YZ. X Z Two speakers at the positions X and Y (not to scale)

An FM communication system has a sensitivity of 4 kHz/V. How much deviation (in Hz) does it produce with a sine wave input of 19.66 Vpeak at a frequency of 4.8 kHz?

The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increase from 30 to 65 dB. What is the ratio of the final sound intensity to the original sound intensity?

If the two machines, M1 and M2 are turned off, and assuming that total sound pressure level is 120 dB, analyze the sound pressure level of the background noise (in decibels) and its mean square pressure (in N/m²) at the operator position. (ii) If the data from Table Q2(b) is converted to octave band as shown in Table Q2(c), examine the total sound pressure level in dB(A) and total mean square .... (1i1) pressure (in N/m²). (iv) Describe briefly three method to control the noise if the answer in Q2(b)(iii) is SPL > 85 dB(A).

The loudest sound produced by a living organism on Earth is made by the bowhead whale (Balaena mysticetus). These whales can produce a sound that, if heard in air at a distance of 2.60 mm , would have an intensity level of 157 dBdB . This is roughly the equivalent of 5000 trumpeting elephants. How far away can you be from a 157 dBdB sound and still just barely hear it?(Assume a point source, and ignore reflections and absorption.)

Two speakers connected to the same frequency generator emit a sound with afrequency of 500 Hz. As a person walks around in the room, he finds areas wherethe sound becomes loud and clear and areas where it is more muffled. At one spotwhere the sound is a maximum, the student is 3.2 m from one speaker. What isthe closest possible distance he could be to the other speaker?

Problem 12: Two speakers placed 0.98 m apart produce pure tones in sync with each other at a frequency of 1225 Hz. A microphone can be moved along a line parallel to the line joining the speakers and 9.6 m from it. An intensity maximum is measured a point Po where the microphone is equidistant from the two speakers. As we move the microphone away from Po to one side, we find intensity minima and maxima alternately. Take the speed of sound in air to be 344 m/s, and you can assume that the slits are close enough together that the equations that describe the interference pattern of light passing through two slits can be applied here. Part (a) What is the distance, in meters, between Po and the first intensity minimum? ly'₁l = 1 ~Part (b) What is the distance, in meters, between Po and the first intensity maximum? Part (c) What is the distance, in meters, between Po and the second intensity minimum? Part (d) What is the distance, in meters, between Po and the second intensity maximum? Part…

Problem 8:  Two speakers placed 0.99 m apart produce pure tones in sync with each other at a frequency of 1730 Hz. A microphone can be moved along a line parallel to the line joining the speakers and 9.8 m from it. An intensity maximum is measured a point P0 where the microphone is equidistant from the two speakers. As we move the microphone away from P0 to one side, we find intensity minima and maxima alternately. Take the speed of sound in air to be 344 m/s, and you can assume that the slits are close enough together that the equations that describe the interference pattern of light passing through two slits can be applied here. Part (a)  What is the distance, in meters, between P0 and the first intensity minimum? Part (b)  What is the distance, in meters, between P0 and the first intensity maximum? Part (c)  What is the distance, in meters, between P0 and the second intensity minimum? Part (d)  What is the distance, in meters, between P0 and the second intensity maximum?  Part…