ENSH 102 · Chapter 2
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A hall has dimension $10\,\mathrm{m} \times 8\,\mathrm{m} \times 6\,\mathrm{m}$, and average absorption coefficient of hall is $0.05$. Calculate the number of reflections of sound wave made per second in the hall and reverberation time of the hall. Velocity of sound wave is $340\,\mathrm{m/s}$.
What is the total absorption and reverberation time for hall of length $12\,\mathrm{m}$, breadth $11\,\mathrm{m}$ and height $9\,\mathrm{m}$, If the coefficient of absorption for walls, ceiling and floor are $0.02$, $0.04$, and $0.08$ respectively.
The volume of a room is $980\,\mathrm{m^3}$. The wall area of the room is $150\,\mathrm{m^2}$, ceiling area $95\,\mathrm{m^2}$ and floor area is $90\,\mathrm{m^2}$. The average sound absorption coefficient for wall is $0.03$, for ceiling is $0.80$ and for the floor is $0.06$. Calculate the average sound absorption coefficient and reverberation time for hall.