A person stands between two speakers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other. What type of interference does the person perceive? OA. destructive OB. constructive OC. both constructive and destructive O D. neither constructive or destructive

In which medium sound cannot travels? a. Liquid Ob. Vacuum. Oc Solid Od. Gas

A sound wave of frequency 880 Hz and power 50.0 W creates loudness at a sound meter of 40.0 decibels. If the power level is tripled to 150 W, the sound level would increase to about Group of answer choices a.43 db b.44.8 db c.46 db d.20 db

25. Which standing wave pattern is a possible pattern for the pipe closed at one end? We have two organ pipes, both 1 m long, one closed at one end and one with both ends open. The figures below represent possible standing wave patterns for those pipes. Im •DOOO O A. A O B. B C. C O D. Both A & B are possible O E. Both A & C are possible F. Both B & C are possible O G. All of A, B, & C are possible

A pulse is traveling towards the boundary from a more dense medium to a less dense medium. Medium1 Medium 2 More Dense Less Dense The partially reflected wave will be with respect to the incident wave. a. 270° out of phase O b. 180° out of phase O c. 180° in phase d. in phase

6. What is the maximum frequency of the signal transmitted thro the two speakers which are displaced at a distance 3m. If the observer is located at a point 1.5m perpendicularly away from the speaker. The observers are displaced by 1.5.m

IV. It's not possible to use Through - Transmission Technique of ultrasonic inspection method to provide depth information of flaws because: a. Only one searching unit used in the inspection. b. It depends on reflection of sound from interfaces. c. It depends on attenuation of sound waves within the test piece. d. Sound wave travel time is not considered in this technique.

The siren is moving away from the listener with a speed of 33m/s, and the listener moves toward the siren with a speed of 8 m/s what frequency does the listener hear if the siren emits sound with frequency 334 Hz. Speed of sound is 344 m/s.f

If a sound is increased from 60 dB to 80dB, by how much should the intensity of the sound increase?a. 10xb. 100xc. 1,000xd. 10,000x

WT-2 A pipe closed at one end and open at the other has a length of 0.750m. Jiatai places a speaker producing a low sound frequency above the open end of the tube. He then increases the frequency slowly. The pipe is in air at sea level. a) Draw the possible standing wave patterns for the sound waves in the tube starting with the lowest frequency. lowest frequency fa fo fa highest open end L=0.750m closed end L=D L= 2 b) Below each pattern write the tube-length-to-wavelength relationship for each pattern. c) Write the general symbolic relationship for the frequency of the n" harmonic, fn. Specify the possible values for n. d) Put the known information into your equation and find the numerical value of the frequencies fa, f, fes and fg. e) Jiatai can hear frequencies up to 19,980HZ. What is the highest frequency of the highest harmonic that Jiatai can hear from this tube and what is the harmonic number n of that harmonic?