Becky and Rajiv are standing at different points in along tunnel while Naomi adjusts her bass amplifier atone end. As Naomi plays an 88 Hz tone, Becky cannothear much and Rajiv complains that the volume is tooloud. What is the minimum distance between Beckyand Rajiv? (Use 343 m/s for the speed of sound.)

Two small speakers are driven by a common oscillator at 7.60 ✕ 102 Hz. The speakers face each other and are separated by d = 1.27 m. Locate the points along a line joining the two speakers where relative minima would be expected. (Use v = 343 m/s. Choose one speaker as a reference and enter your answers as positive distances from this speaker, from smallest to largest. Enter NONE in unused answer boxes.) m m m m m m

Two speakers, facing each other, produce coherent sound waves that interfere destructively at a point that is ¾ of the way from one speaker to the other. If the speed of sound is 343 m/s, and the sound waves are emitted in phase at 880 Hz, which of the following is a possible distance between the two speakers?

Two omnidirectional 350 W loudspeakers are placed 10.0 m apart, each emitting a high- volume single tone in phase with each other, pitched at 261.63 Hz. (i) An observer is standing directly between the two speakers. Calculate the minimum distance that the observer should move towards one of the speakers to avoid hearing the sound emitted from the speakers

The acoustical system shown in the figure below is driven by a speaker emitting sound of frequency 777 Hz. (Use v = 343 m/s.)A rectangular tube where the top section is comprised of a sliding U-shaped part has an opening at the center of the left and right sides of the tube. A speaker is pointed at the opening on the left side and shows sound waves entering the tube going through both paths towards the right opening. A human ear labeled Receiver is next to the right opening.(a) If constructive interference occurs at a particular instant, by what minimum amount should the path length in the upper U-shaped tube be increased so that destructive interference occurs instead? m(b) What minimum increase in the original length of the upper tube will again result in constructive interference? m

A child complaining of hearing loss is found to have a auditory threshold in the left ear of 40 dB, whereas the threshold in the right ear was measured at 10 dB. By what factor was the minimum sound intensity heard in the left ear greater than the minimum sound intensity heard in the right ear?A.3B.4C.30D.1000