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A divice for receiving images over a distance is called a television which evrybody uses!

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16y ago

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How do musical instiments produce soundwaves?

Woodwinds and brass instruments tend to directly vary the density / pressure of an air stream, with the instrument "flavoring" the sound with harmonics natural to the instrument. Stringed instruments, drums, cymbals, and electronic instruments typically cause vibration in the instrument body (or speakers), which in turn produces the sound waves.


Does your distance from a sound source affect how loud the sound seems?

The sound pressure decreases with distance r in a free field (direct field). The next question is. How does the sound decrease with increasing distance? After which law? Answer: The sound pressure p diminishes with distance after the 1/r law. Sound pressure decreases inversely as the distance increases with 1/r from the sound source. The Sound pressure level (SPL) decreases by (−)6 dB per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value. Sometimes it is said, that the sound decreases with with 1/r², the inverse square law. That is really wrong. Scroll down to related links and look at "Damping of sound level with distance".


When was The Sounds of the Sounds of Science created?

The Sounds of the Sounds of Science was created in 2002.


What are ultrasonic sounds?

Ultrasonic sounds are sounds that are above our hearing range.


What quality of sounds does a physician hear as overactive bowel sounds?

During an examination a physician hears overactive bowel sounds known as high-pitched tinkling bowel sounds.