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What Produced by reflected sound waves over 17m away?

Updated: 4/3/2020
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Produced by reflected sound waves over 17m away?

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Q: What Produced by reflected sound waves over 17m away?
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Why can you not hear the echo if you stand 20 meter away and shout towards it?

You are too close to the surface from which the sound waves are reflected. As a result you brain cannot distinguish between the original sound waves and the reflexted sound waves (the echo).


What do sound waves travel away from?

The source that emitted the sound wave.


How does speed affect the frequency of reflected waves?

The Doppler Effect describes a frequency shift in reflected waves in proportion to the relative speed between the receiver and the reflected object. For instance, in a radar speed trap, the frequency shift in reflected radio waves allows the unit to calculate the speed toward (higher frequency) or away from (lower frequency) the transmitter/receiver unit. When you drive past a steady noise source, such a bell or a horn, the sound has a higher frequency as you approach and a lower frequency as you depart.


How are sound waves unique?

Sound waves move away from the source of energy, but other sorts of waves move perpendicular (at a right angle) to the energy source


Why does the Doppler effect explain why a siren's pitch decreases as it moves away from you?

The siren moves away from the sound waves it has already produced, increasing their wavelength. Make sure it says INCREASING and not DECREASING -Apex :)


What happens to sound waves as they move away from the source of the sound?

They get distant and more quieter


How do sound waves travel though the air?

far away


Do sound waves move closer or farther away from a vibrating object?

farther away


Why does the frequency of sound waves change for a listener when the sound source moves towards or away from the listener?

This is an example of the Doppler effect. Sound is composed of waves. A particular vibration produces a sound wave with a particular wavelength. When the sound source moves towards a listener the waves are "bunched up". That results in a shorter observed wavelength and thus a higher frequency. When the sound source moves away the opposite happens. The frequency of the sound waves decreases.


Why does the frequency of sound waves change for a listener when the sound source move toward or away from the listener?

This is an example of the Doppler effect. Sound is composed of waves. A particular vibration produces a sound wave with a particular wavelength. When the sound source moves towards a listener the waves are "bunched up". That results in a shorter observed wavelength and thus a higher frequency. When the sound source moves away the opposite happens. The frequency of the sound waves decreases.


How can elephants hear from far away?

they funnel in the sound waves from the enviroment


If sound waves travel away from there source there what decreases?

There energy decreases