Below is a sound pressure level spectrum in octave bands, measured at a receiver location distant from the source. The source and receiver of this sound are both 2 m off the ground. A barrier, 5.5 m tall, is built 3 m from the source.

A student wants to establish a standing wave on a wire 1.8 m long clamped at both ends. If the wave speed is 72 m/s, what is the minimum frequency she should apply to set up standing waves? 15 Hz O 18 Hz O 24 Hz 20 Hz 12 Hz

A speaker puts out a constant sound with a power of P = 15 milliwatts and frequency fs = 256 Hz. Find: the frequency (fo) you’d hear if the speaker approached you at vs = 28 m/s (take the speed of sound to be v = 343 m/s) the frequency (fo) you’d hear if you approached the speaker at vs = 28 m/s (take the speed of sound to be v = 343 m/s) the frequency (fo) you’d hear if it moved away from you at vs = 28 m/s (take the speed of sound to be v = 343 m/s) the frequency (fo) you’d hear if you moved away from it at vs = 28 m/s (take the speed of sound to be v = 343 m/s)

A sound wave has frequency f and velocity VM in a particular solid medium. What is its wavelength in the medium? f = 400 Hz; (in m) VM = 3720 m/s; OA: 9.300 OB: 1.237x10¹ OC: 1.645x10¹ OD: 2.188x10¹ OE: 2.910x10¹ OF: 3.870x10¹ OG: 5.147x10¹ OH: 6.846x10¹