A rectangular room has walls 6 m and 10m long and 3m high. The sidewalls have...
A rectangular room has walls 6 m and 10m long and 3m high. The sidewalls have absorptivity ?=0.05. The floor has a carpet with ?=0.45, and the roof is made of wood with ?=0.15. A machine is placed in the room and gives a background noise level of 65dB re 20
Homework Answers
VOLUME=LBH
=6*10*3
=180m3
area=2(60+30+18)
=216m2
=0.161*180/216*0.65
=0.2064seconds
dB=10log(I/I0)
from this find I
=
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A rectangular room has walls 6 m and 10m long and 3m high. The
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A room is 6 m long, 5 m wide, and 4 m tall. The walls, ceiling, and floor all initially have the same sound absorption coefficient (a 0.01). When all acoustic sources (machines) are active, the sound pressure level (SPL) measures 90 dB. However, to meet certain noise standards, the SPL has to be reduced to 80 dB by installing carpet on the floor. a) What should the carpet's sound absorption coefficient (ae) be? b) If the SPL must be...
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A room is 6 m long, 5 m wide, and 4 m tall. The walls, ceiling, and floor all initially have the same sound absorption coefficient (a 0.01). When all acoustic sources (machines) are active, the sound pressure level (SPL) measures 90 dB. However, to meet certain noise standards, the SPL has to be reduced to 80 dB by installing carpet on the floor. a) What should the carpet's sound absorption coefficient (ae) be? b) If the SPL must be...
summatize the following info and break them into differeng key points. write them in yojr own words
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ambulatory care clinic observe an increase in the number of clients
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reducing the development of hypertension?
A appropriate rtising or a chan who is unconsaus. Which of the following actions proving the duona caur O Anurse is caring for a dient who has right-sided paralysis following a cerebrovascular accident. Which of the following prescriptions should the...
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