Question

give an account on some sources of sound
Atleast in40 words

Answer 1

Sound is a type of energy made by vibrations. When any object vibrates, it causes movement in the air particles. These particles bump into the particles close to them, which makes them vibrate too, causing them to bump into more air particles. This movement is called sound waves.

Electronic Instruments

Electrical vibrations are the starting point of sounds from electronic organs and synthesizers. Circuits create a variety of waveshapes that might mimic standard instruments or make totally new sounds. Since wave generation takes place electronically, it's easy to make new sounds with many different effects. It becomes sound, however, only when the electronic signal goes to an amplifier and speakers.

Living Things

Animals and people make sounds with their vocal cords, their mouths and other body parts. Vocal cords vibrate from air pressure, making sound. Insects rapidly rub their legs, wings or other organs to make noise. In the jungle, parrot screeches can carry for miles. Muscles turn chemical energy into mechanical energy. Squeezing and rubbing body parts turn mechanical energy into sound energy.

Machines

In industry, machines make sound in ways similar to musical instruments. However, machines operate at higher speeds and with more power than instruments. They can be designed with sound-absorbing materials to make them quiet, but they're seldom designed to sound pleasant. Loud, rapid impacts of metal on stone make the percussive noise of a jackhammer. Metal parts, rubbing from friction, create the squeal of brakes. Fifty ignitions per second and the clatter of spinning gears make the roar of an engine.

Nature

The energy released when falling water hits a beach makes the sound of surf.

The energy released when falling water hits a beach makes the sound of surf. Lightning explosively heats air, sending sound waves we hear as thunder. Wind, produced by heat from the sun, makes noise through setting objects into vibration. Wind can howl against itself when it gusts.

 

Answer 2

the sound waves are generated by a sound source , such as the vibrating diaphragm of a stero speaker . The sound sources creates vibration in the surrounding medium .As the source continues to vibrate the medium ,the vibration propogate away from the source at the speed of sound , thus forming the sound wave ......


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