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Sound topics

Overview of Sound Waves

Creating Sound Waves

Frequencies and Wavelengths of Sound

Speed of Sound in a Gas

Doppler Effect for Sound

Doppler Effect Equations for Sound

Traveling Faster than Sound

Making Sounds with Musical Instruments

Sound or Music from a String

Equation for Sound from a String

Thickness and Material Factors in Equation for Sound from a Wire

Detecting Sound Waves

How Obstacles Affect Sound Waves

Sound Echoes

Sound Amplified Over Water

Reproducing Sounds

Beat Frequencies in Sound

Acoustics in Buildings

Noise Reduction

Active Noise Cancellation

Hearing


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Answers to Readers' Questions on Sound. Also refer to physical science, waveform, vibration, compression, matter, vacuum, characteristics, amplitude, volume, velocity, speed, air, frequency, pitch, wavelength, ear, microphone, Ron Kurtus, School for Champions. Copyright © Restrictions

Answers to Readers' Questions on Sound

The following 4 questions have been answered. They are listed according to date.

List of first 10 items

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Sound waves on planets

Question

January 20, 2010

I wanna know about the sound waves in other planet and the earth and the air....
and i wanna know what happen with these waves in other planet?

Hanie - Iran

19084

Answer

Sound waves travel through the air on the Earth and through the atmosphere and other planets, provided they have an atmosphere. For example, the moon has no atmosphere, so sound does not travel there. Likewise, Mars has a very thin atmosphere, so sound barely travels there.

If the atmosphere is more dense and hotter than the Earth's atmosphere, the speed of sound will be greater than on Earth.

See: http://www.school-for-champions.com/science/sound_speed_gas.htm

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Hearing sounds over 20,000 Hz

Question

January 18, 2010

I wanna know about the effects of the sounds that are over 20000hz and 10hz on humans....
and i wanna know about the waves on space!!!!
tnx

Hanie - Iran

19072

Answer

A normal human can hear between 20 Hz and 20,000 Hz. That means a person cannot hear sounds below 20 Hz and above 20,000 Hz. Although dogs can hear beyond that range. See:
http://www.school-for-champions.com/senses/hearpitch.htm

Sound waves do not travel in space, because they need air or some other material to travel. See:
http://www.school-for-champions.com/science/sound.htm

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What is sonar?

Question

October 29, 2009

What is sonar?

sreyashi - India

18591

Answer

Sonar is similar to radar, except that sound is used. A sound wave is sent out and the echo is detected, giving information about the distance away and shape of the object.

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Wants to go to school in acoustics

Question

July 15, 2009

Hi there,
My name is Matthew hart and I was reading over the material in your Sound Wave Topics and saw you had an email.

I'm not sure if you are the right person to ask but my whole life I have been extremely interested in sound, acoustics, and musical technology. My dad has a passion for his music, electronics, and speakers so he has taught me much. I am almost 17 looking for a college that specializes in these sorts of learning. If you have any recommendations or ideas I would love some feedback very much.

Thank you!!!

Matthew - USA

18024

Answer

Typically, you would first study physics or engineering before specializing. The problem is finding a school that offers the type of subjects you want. You might check with a nearby college to see what they offer. You also may be able to get some ideas.

Look at http://www.science-engineering.net/acoustics.htm for some good information.

Also look into the Acoustical Society of America at http://asa.aip.org/. See if they have a chapter in your location. They could give you some good advice.

Some college sites on acoustics and sound include:
http://www.pa.msu.edu/acoustics/
http://www.phys.unsw.edu.au/music/

I hope this helps. Best wishes in getting to the college of your choice and in having a good career in the sound/acoustics/music field.

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