How far away could you still detect a sound source with 100 mW of acoustic power released for 0.010 seconds and a sound pressure level of 30dB re 20uPa?

A rock band creates a sound intensity level of 111 dB at a distance of 20.0 m. (a) Calculate the sound intensity. W/m2 (b) Assuming sound from the amplifiers travels as a spherical wave, what average power do the amplifiers generate?

What is the decibel level of a sound that is twice as intense as a 100.0-dB sound? (b) What is the decibel level of a sound that is one-third as intense as a 100.0-dB sound?

An 6 hour exposure to a sound intensity level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.600 cm diameter eardrum so exposed?

Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If the air temperature is 250C (sound travels at 346 m/s), what is the wavelength of this sound? (b) If the intensity at a location 22 m away from the sound source is 3x10-4 W/m2, what is the power of the sound coming from the speaker?

Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low efficiencies. Calculate the power input needed to produce a 90.0-dB sound intensity level for a 12.0-cmdiameter speaker that has an efficiency of 1.00%. (This value is the sound intensity level right at the speaker.)

(a) What is the speed of sound in a medium where a 100-kHz frequency produces a 5.96-cm wavelength? (b) Which substance in Table 17.1 is this likely to be?