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Why the entire frequency range of 20hz-20khz is not used in telephony?
Wiki User
∙ 12y ago
Because it is not necessary, and providing that bandwidth would increase cost and complexity. While the full range of 20Hz-20KHz is required for proper rendering of music, telephony, by standard, only requires a 3.5KHz bandwidth. You can hear and understand the spoken voice with only this range. You do not need the extended musical range.
Wiki User
∙ 12y ago
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