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lephants can create and detect infrasonic sounds- sounds of frequencies lower than about 20 Hz- which can travel long distances. They create these sounds using the cavity that extends from their larynx to the tip of their long trunk. Consider this cavity as a cylindrical air column, of length 4.65 m, that is closed at the larynx and open at the tip of the trunk.    a) chose the image that shows the standing wave associated with the displacement of the air molecules for the first fundamental frequency f1 produced in the air column.  b) calculate the fundamental frequency of a standing wave in such an elephant's air column, in hertz. Take the speed of sound in air to be 352 m/s. c) with the same speed of sound in part (b), 352 m/s, how long in meters would an elephant's air column have to be to maintain a standing wave at a fundamental frequency of 8.6Hz?

lephants can create and detect infrasonic sounds- sounds of frequencies lower than about 20 Hz- which can travel long distances. They create these sounds using the cavity that extends from their larynx to the tip of their long trunk. Consider this cavity as a cylindrical air column, of length 4.65 m, that is closed at the larynx and open at the tip of the trunk.    a) chose the image that shows the standing wave associated with the displacement of the air molecules for the first fundamental frequency f1 produced in the air column.  b) calculate the fundamental frequency of a standing wave in such an elephant's air column, in hertz. Take the speed of sound in air to be 352 m/s. c) with the same speed of sound in part (b), 352 m/s, how long in meters would an elephant's air column have to be to maintain a standing wave at a fundamental frequency of 8.6Hz?

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Elephants can create and detect infrasonic sounds- sounds of frequencies lower than about 20 Hz- which can travel long distances. They create these sounds using the cavity that extends from their larynx to the tip of their long trunk. Consider this cavity as a cylindrical air column, of length 4.65 m, that is closed at the larynx and open at the tip of the trunk. 

 

a) chose the image that shows the standing wave associated with the displacement of the air molecules for the first fundamental frequency f1 produced in the air column. 

b) calculate the fundamental frequency of a standing wave in such an elephant's air column, in hertz. Take the speed of sound in air to be 352 m/s.

c) with the same speed of sound in part (b), 352 m/s, how long in meters would an elephant's air column have to be to maintain a standing wave at a fundamental frequency of 8.6Hz? 

 

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