Sound -is- vibration. A 'body' totally motionless makes no noise. it is only the movement of the air - which is either moving due to the wind, or because something is passing on vibrations to it, that creates sound.

Our hearing can detect the rhythm of a vibrating substance and we interpret that as sound. Some sounds are beyond our range - either above or below the frequency we can detect.

Sound travels spherically from where it was made. If energy is to be conserved a sphere of an earlier point will have a higher flux density than one from a later point.

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air

That mixture might be a discordant sound or a dissonant sound. It might possibly be a cacophony.

5

Sounds waves as they spread out get weaker and weaker until they just about disappear. Theoretically there will always be some small amount of sound still propagating forever but it will be so weak that it would be unmeasurable. Even if we had the ultimately sensitive listening device and could still detect (hear) sounds from long ago there would be so many other old sounds mixed together that all we would hear would be just noise, probably sounding like a hiss or a humming sound.

The sound wave is actually a pressure wave. The air molecules move together and then farther apart, creating volumes which alternate between (slightly greater than normal pressure) and (slightly less than the normal pressure). A volume, at a specific pressure, can be expressed as energy (pressure times volume has the same units as energy: Newton meter, or Joule). You might look at sound-physics dot com, for more info. This site doesn't do well with links plated in the answer, though. Look for Sound-Waves.

it is the pitch

• SONAR on submarines and ships
• Ultrasound medical imaging machines
• Speakers
• Headphones
• Microphones
• Hearing aids
• Doctor's stethoscope (passive)
• Megaphone (passive)
• etc.

In a standard non-electronic telephone the transmitter is wired between the two incoming wires of the telephone line. A 'carbon granule' transmitter consists of a small tube filled with carbon granules with a piston at one end attached to a diaphragm. Sound waves cause the diaphragm to vibrate and compacts or loosens the granules altering their electrical resistance in sympathy with the sound. This modulates the line current and is received at the telephone exchange via a transformer called a 'transmission bridge'.

The Greek letter "lambda" is the symbol for wavelength.

The membrane that vibrates and transmits the vibrations is called the tympanic membrane or the eardrum. It is the divider between the external and middle chambers of the ear.

Yes it does. Higher pitched sounds have higher frequencies than lower pitched sounds.

It is when a group of people die in a circuit thanx for reading!!!!!!!!!!!!

"Radio" is the name we give to a section of the electromagnetic spectrum, so it can

include whatever wavelengths we decide to use that name for.

Radio is generally considered to be everything in the electromagnetic spectrum with

wavelengths of one millimeter or longer, corresponding to any frequency up to 300 GHz.

There are countless places that sound energy be found in everyday life. For example, in any set of computer speakers.

Microphones will convert sound waves into electrical signals. An ear (i..e human ear) will also convert sound waves into electrical signals.

Bats use the sounds they create in an important navigation method called echolocation, which lets them sense objects from the sound reflecting off of those objects. This requires their ears to be adapted to their voice, though their sounds are often unique pulses.

The ultrasonics used in various applications like in Industrial , medical ,etc.

# INDUSTRIAL APPLICATION:

1. ultrasonics are used for soldering and drilling purposes .

2. ultrasonics are used for cutting and welding purposes also .

3. ultrasonics are used to emulsify immiscible liquids like mercury and water.

4. ultrasonics are used for cleaning of tiny objects like watches etc .,

5. ultrasonics are also used in the sterilization of water and milk.

#MEDICAL APPLICATION

1.Ultrasonics waves are used for relieving neuralgic and rheumatic pain .

2.Ultrasonics waves are used to destroy dangerous tissues in the human bodies .

3. Ultrasonics are used in extraction of broken teeth without pain .

4. Ultrasonics waves are used to find the velocity of blood flow and the movement of heart in human body also .

water Dense solid objects