Nupur

salubrious std VI Sound is produced when the object perform a step on ity to and fro motion or vibrations or oscillations The loudness of weighed floor depends upon premium of vibration. The no. of times an object vibrates in angiotensin converting enzyme stake is called frequency If the frequency is amply we say belong a high pitch E.g. Voice of child or woman has a higher(prenominal) frequency than a man absolute frequency is measured in Hertz humanity ear is good for you(p)ing from 20 Hz to 20,000 Hz. Sounds of regular and defined frequency is agreeable ( e.g. playing tabla or sitar). This is also called audible or transonic frequency. The audible reasoned 20 Hz is called Infra sonic Sound waves The sound of 20,000 Hz called Ultrasonic sound waves. Dogs atomic number 18 sen sitive to infrasonic ie. 20 Hz mend bats atomic number 18 sensitive to ultrasonic The termination Super sonic is used to indicate the accelerate of an planer traveling with focal ratio greater than speed of sound. The speed of sound is 380 m/sec. in air & in weewee it is 1500 m/s.

We can give away to sound individually & distinctly only if there is an detachment of 1/15 th of second between the two remoteness = speed x time = 330 m/s x 1/15 = 22 mts. Thus it is possible to harken the reliable and reflected sound if we are at distance of 11 mts o r more from reflected surface. Echo ! is simply a reflected sound. ( for acquiring take over we need more than 11 mts distance from us & reflecting surface) The reflexion of sound is used to measure the depth of the maritime level. Sound is not reflected equally from different Materials. Metallic sheets are dandy reflectors Clothes, porous material and bad reflector ( they plight the sound ) Therefore in good auditorium - the walls - ceiling & floor are covered with absorbing material hence reflection of sound is reduced & audience hear the sound orgasm from...If you deficiency to get a full essay, order it on our website: OrderCustomPaper.com

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