A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 64.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?
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A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 64.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?
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- A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 51.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?mmThe intensity of a sound wave, as it strikes a circular ear drum, is 0.65 W/m2. The amount of energy carried in this wave is 6 × 10-6 J, and the sound lasts for one second. Part (a) Calculate the radius of the ear drum, in meters. Part (b) If the sound wave travels at 326 m/s and has a wavelength of 1.1 m, calculate its frequency.Male Rana catesbeiana bullfrogs are known for their loud mating call.The call is emitted not by the frog’s mouth but by its eardrums, which lie on the surface of the head. And, surprisingly, the sound has nothing to do with the frog’s inflated throat. If the emitted sound has a frequency of 260 Hz and a sound level of 85 dB (near the eardrum), what is the amplitude of the eardrum’s oscillation? The air density is 1.21 kg/m3.
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