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Sound Festival - 1982 1-1 was released on:
USA: 1982
Sound energy are of two types -1 Monotous sound 2-hipotous sound
The speed of sound is a Mach. 1 Mach for a particular medium is the distance that sound would travel through that medium in 1 second.
Speed of sound in kms-1 = 0.3432 kms-1
The word "an" contains 1 sound, which is the sound of the short vowel "a."