Sound Waves

The amplitude of a sound corresponds to its loudness so an increase in amplitude will correspond to a louder sound.

your mum carries them under her chins and deposits them next to your ear while she has a cheeky lick at the same time.

A beam of sunlight falling on a prism refracts and forms seven color bands. This illustrates that

A)

B)

C)

D)

sound waves can only travel through particles as particles vibrate. this is why solids let sound pass easiest as the vibrations are passed on the easiest. in a vacuum there is no sound because there are no particles

Sound itself is a wave. Your brain is able to process this wave as sound as it vibrates across your eardrum. The frequency and amplitude of this wave determines how you hear it (what it sounds like), or whether or not you even hear it at all.

they dig a long hole in the ground and find it

By shock waves synapsing through ears and turtles in an ocean communicating through the balls of your body

I think you mean pitch.

We communicate using sound waves by talking and listening to one another!

The result of a reflected sound wave is obviously an echo.

The sounds reflect off of other surfaces. Usually the reflective sounds will create an illusion that they are coming from every direction. That's why city ambulances running lights/sirens often get in accidents, is drivers don't know where they are coming from and don't yield. Sirens are really loud...

An Echo-echo-echo-echo! The answer is Echo

The idea is that our ears have organs which are specifically designed to detect those vibrations. Note that only vibrations between about 20 and 20,000 hertz (i.e., cycles per second) can be detected by human ears.

I would expect any movement of matter to cause some sound.

amplitude

The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound.

The auditory canal allows sound to get to the eardrum.

By the frequency. The higher the frequency, the shorter the wavelength. The lower the frequency the longer the wave length.

C= L * f

C = Time in milliseconds (343 m/s @ 20 degrees C , L= Wave Length or Lambda in meters and f= frequency in Hertz

A little algebra and you have;

L= C/f

Example; 343 m/s / 100 Hz = .343 meters

Frequency is a function of time, cycles per second. Time is the reciprocal of frequency

(1/f= T).

Something must vibrate, to make the air (or whatever else the sound travels through) vibrate.

The curtains provide attractive sound deadening so that it doesn't echo in the theater. Some theaters just use other sound absorbing methods but the curtains are something of a hold-over from the older theaters where plays and concerts were performed in the past and have a nice appearance.

Often both.

pinna

Sonar

the interaction between sound waves is called interference.