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In cavity wall construction for soundproofing, the width of the cavity should be at least _________

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In cavity wall construction for soundproofing, the width of the cavity should be at least _________

(a) 3 cm

(b) 5 cm

(c) 8 cm

(d) 12 cm

The question was asked by my school principal while I was bunking the class.

I would like to ask this question from Acoustics topic in division Acoustics and Ventilation of Construction & Building Materials

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Right option is (b) 5 cm

For explanation: In cavity wall construction for soundproofing, the width of the cavity should be at least 5 cm. This type of construction ideal from the point of view of soundproofing. The cavity is either left air-filled or filled with some resilient material.

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