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© toppr Sound fad, , Cera) ee eur), * Produced by vibrations. A sound isan energy that is transmitted in, * When a tuning forks struck, its prongs _the form of sound waves., vibrate producing sound waves. * When the objects vibrate, the air, * Speed of the sound depends on the surrounding it vibrates and sound waves, ‘medium by which sound waves travel are carried., * Sound produced in humans is due to _—* If there is no medium, then vibrations in, the vocal cords. {an object wil not travel through it., , es, , Sound produced by humans, , "The human voice is produced by the Vocal Cord, , en, , through the laryn, the vocal cords, , irate a reueny a, , proce sound, + inn thee sound waves ps, , trough ou cut and gt, , eptenand uatyarechoneed— IRS, , and the sound waves are converted, into understandable speaking. asec ‘cise, , , , tree eie), , , , “The audible range of sound for human beings extends from about 20 He to 20000 Hz, * Any sound outside this hearing range is undetected by human ears regardless ofits, , amplitude., a, , , , infrasounds, , , , , , , , | elephant Mole!, , , , rire ana), , , , The characteristics of sound are as follows:, , Pitch, , * Loudness, , * Quality, , Pitch, , * Pitch isa characteristic of sound by which a correct note can be distinguished from a, Brave or a flat note., , * Pitch depends upon the frequencies of the sound wave., , * Anate has a higher pitch when the frequency is high and a note of low frequency has, alow pitch,, , Loudness, * The loudness isa sensation of how strong a sound wave is ata place., * Loudness increases with amplitude., * Loudness is measured in decibel (dB). It's given as:, LL= log), here ' isthe intensity., Quality, * Quality or timbre describes those characteristics of sound which allow the ear to, distinguish sounds which have the same pitch and loudness.