User:Vathsala A

We come across sound in every moment of our life. It is really important to what sound is, how it is produced, how it propagates etc..,

SOUND:
Sound is a form of energy that enables us to hear.

PRODUCTION OF SOUND:
Vibrating objects produce sound.

Eg:
1.Musical Instruments produce sound by vibration. Vibrating parts in different instruments are, 2.Tuning Forks when hit against a rubber pad produces sound Here the vibrating part is “TINES” 3.Humans also produce sound while singing,shouting and talking. In the above case singing,shouting and talking vibrating part is” VOCAL CORDS”
 * String in Veena
 * Stretched membrane in Tabla
 * Air Column in Flute
 * Air Column in Nadaswaram
 * String in Guitar

PROPAGATION OF SOUND-Need of medium for propagation:
Sound propagates/travels from one place to another place,that is why we can hear sounds produced. Sound travels though medium like gas, liquids and solids to reaches our eardrum.This sound signal is sent from ear to brain. In order to understandpropagation of sound understand:   https://www.youtube.com/watch?v=Dz2Lj_cJ5QM

Why can't astronauts talk to each other directly in space as we talk on earth?Because in space there is no medium for propagation https://www.youtube.com/watch?v=E7RVmbVru6Y

DETECTION OF SOUND:
We know that our ear detects sound but what exactly happens with our ear,to make us hear.

https://www.youtube.com/watch?v=C6ZQUmBg1eU

AUDIBLE SOUNDS:
Sounds which are in the range of 20 Hz to 20 KHz.

INAUDIBLE SOUNDS:
Sounds which are above 20 Hz and below 20 KHz.

You can experience audible frequency waves in here..click the link below to go for it https://www.youtube.com/watch?v=EyDaZoUUVrY