10. 0-12 points ShpPS14 6 E 012. My Notes O Ask Your What are the wavelength lim

Question

10. 0-12 points ShpPS14 6 E 012. My Notes O Ask Your What are the wavelength limits of the audible range of the sound spectrum? (Use the speed of sound in alir. The speed of sound in air is 344 m/s. The audible range of the sound spectrum contains frequencies as low as 30 Hz and as high as 25 ktz.) smallest value largest value olu... l Re.. Need Help? Read I stica... 11. -a points ShipPS146E014. My Notes Ask Your rventi... hts C... eam stand... f Educ.. A sound wave in a solid has a frequency of 69.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air? (The speed of sound in air is 344 m/s.) speed of sound in solid m/s speed of sound in solid speed of sound in air Need Help? Read h 314 -instr... My Notes Ask Your

Explanation / Answer

Solution(10):

Let us go to the basics first.

We know that

Wavelength = Speed / frequency ..................Eqn.1

For frequency (25 KHz):

Wavelength = 344 m/s / 25000 Hz = 0.01376 m (Answer ==> Smallest value)

For frequency (30 Hz):

Wavelength = 344 m/s / 30 Hz = 11.47 m (Answer ==> Largest value)

Solution(11):

Wave speed = Wavelength * Frequency

=>Speed of sound in solid = 0.333m * 69000 Hz = 22977 m/s (Answer)

Speed of sound in solid / speed of sound in air = 22977 / 344 = 66.79 (Answer)

Thanks!!!

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