Answers to Readers' Questions on Sound Reproduction. Also refer to physics, waves, sound, light, frequency, sonar, pitch, tone, distorted sound, tuning fork, microphone, loudspeaker, equalizer, Ron Kurtus, School for Champions. Copyright © Restrictions
Answers to Readers' Questions on Sound Reproduction
The following 3 questions have been answered. They are listed according to date.
List of first 10 items
- Uses of multiple reflection of sound
- How does a piano tuner adjust the pitch?
- Amplitude in an AM radio wave
Uses of multiple reflection of sound
Question
November 15, 2009
Respected Sir/Madam,
I need to know about the uses of multiple reflection of sound for preparing a seminar report.
Yedu - India
18667
Answer
Multiple reflections of sound is usually used to muffle the sound, such as in a automobile exhaust muffler. But also, multiple reflections can be used to filter out unwanted frequencies.
How does a piano tuner adjust the pitch?
Question
December 15, 2008
what should a piano tuner do to correct the sound of string to play it a lower pitch than it is currently playing
vikas - India
16959
Answer
The tighter the piano wire, the higher the pitch. If the piano tuner wants it to play a slightly lower pitch, he will loosen the wire a little.
Amplitude in an AM radio wave
Question
October 4, 2005
Can you tell me at what amplitude an AM radio wave is transmitted? Also the same for an FM radio wave. I need to graph an AM transmitted radio wave and although I can figure out the frequency ( and period) I have no idea what to use for amplitude. Thank you - Hilary Brugger
Hilary - USA
8395
Answer
Typcially, when yo graph a waveform, you set the maximum amplitude at either 1.0 or 100%. Actual amplitudes vary too much according to power of the radio station.
AM means amplitude modulation. The signal from an AM radio varies in amplitude according to the loudness of the sound. Frequency varies with the pitch of the sound.
FM means frequency modulation. Within a certain range, the frequency varies according to the loudness of the sound. The frequency variation also includes information about the pitch of the sound.
Summary
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Answers to Readers' Questions on Sound Reproduction