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2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is “x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.

2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is “x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.

Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter5: Separation Processes
Section: Chapter Questions
Problem 5.12P
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2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is "x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.
Transcribed Image Text:2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is "x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.
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