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Because of high concentration of reflected sound at the Sound foci, there is a deficiency of reflected sound at some point known as __________

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Because of high concentration of reflected sound at the Sound foci, there is a deficiency of reflected sound at some point known as __________

(a) Live spots

(b) Dead spots

(c) Sound foci

(d) Reverberation

The question was asked in final exam.

My enquiry is from Acoustics in portion Acoustics and Ventilation of Construction & Building Materials

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The correct option is (b) Dead spots

To explain: The sound level and at dead spots is generally inadequate for satisfactory hearing. This defect can be remedied by the installation of the suitable diffuser so as to have even distribution of sound in the hall.

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