Physics homework about the sound, please help!?
These few weeks, our home:. PS. Please answer I really end Saturday. Must fast for Monday! (Type) 1) speed of sound in the vacuum or not it faster or slower speed in the air? Adjust your answer 2.) What evidence. You to experience the basic physics of the sound of different frequencies travel with the same speed or not. 3) Why is the speed of sound changes with height or not. 4) Why do people have a good singing voice while bathing compared to other places. 5) What should be the voice of good cinema? 6) How the Ultra sound or not. 7) is a sound "white" is what? Which it used? 
scientific way to classify your voice is music. "Sound or" 9) from much noise. If more serious will increase. 10 times? 100 times? 1000 times?
1. Voice demands for media content, audio format. 'Longitudinal waves.' Voice is not available through the vacuum. 2. A) If you measure the speed of sound times with different frequencies. (Allow others the same). Speed will remain unchanged as often. b) from the formula: X = frequency wavelength speed theoretically we can conclude that the speed at different frequencies. Continue to (as appropriate wavelength changes frequently). Exception.: 'Media sound wave will travel will not respond. adiabatically and allows the speed of sound can vary with frequency. '- Wiki source.. 3 two reasons: speed) is directly proportionate to the density of the medium with higher density means more. Speed. Therefore, the maximum speed of sound in air and solid and liquid. (Such as practical to prove that sound better than solid media. – Keep taping table with a pencil now. Ear on the table while continuing your tapping. Not that sound louder when you press your ear to the table or not. ) B speed) will be affected by temperature. "With the temperatures and speeds of sound normally decrease with height increase voice. refracted, from the audience on the floor to create shadows. acoustic at some distance from the source. "- Wiki. So the speed of sound is reduced due to high density, less air and lower air temperature. 4. May be due to the surrounding. Area is the mirror and make sound good. (Somewhat similar to the singing of the chorus.). 5. Should be no reflex mirror and focused reflection. All of these. Depending on the shape of the room and the wall covering material. (Wall plate may be covered with sound absorption to avoid the effects mentioned above). Should be diffused reflection of sound to make sure that all sound the same place and to reduce the use of additional speakers. 6. Effect on the region reflects the sound waves. And agreements with sound waves above. 20kHz frequency beyond the hearing range of human use.:. ultrasonography – the image that fetus is not born. sonar – bringing voice (and since) the specified depth or boat before. / Submarines / etc rock the ship and submarines. Bats use ultrasound to locate their victims. 7. "Majority-white art. Generators are often created electronically in real time in audio test equipment, audio or play through the electronic digital recording. Simple machines include. Configuration more about fans and surrounded. (optionally) change the speed. This fan drives air through a small slot in the production pipeline of a desired sound. "- Use Wiki – Editing. equalizer in concert in the emergency sirens to increase privacy by making it difficult to understand what has been said that distance. (Audio) 8 cover. Voice is the voice of random frequency changes. Music and rhythm are repeatation of record and may include basic harmonics harmonics,. partials or overtones. 9. the increase intensity10 – noise. 2 times the increase of violence. 100 – 4 serious noise this 1000 times. – 8 times violent squall 10000 (= 10 of the power. 4) – 16 bang (= 2 power 4) hope helps!!:).
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