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15.3.2. A 30 kHz sonar transducer produces an axial sound pressure level of 140 dB re 1 μPa at a distance of 1000 m in seawater. Assume spherical spreading and losses. (a) What is the axial pressure level at 1 km? (b) At 2000 m? (c) At what distance will the axial pressure level be reduced to 100 dB? (d) At what distance will TL(geom) equal TL(losses)? (e) At what distance is the rate of transmission loss associated with spherical divergence equal to that associated with absorption?

15.3.2. A 30 kHz sonar transducer produces an axial sound pressure level of 140 dB re 1 μPa at a distance of 1000 m in seawater. Assume spherical spreading and losses. (a) What is the axial pressure level at 1 km? (b) At 2000 m? (c) At what distance will the axial pressure level be reduced to 100 dB? (d) At what distance will TL(geom) equal TL(losses)? (e) At what distance is the rate of transmission loss associated with spherical divergence equal to that associated with absorption?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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15.3.2. A 30 kHz sonar transducer produces an axial sound pressure level of 140 dB re 1 μPa at a distance of 1000 m in seawater. Assume spherical spreading and losses. (a) What is the axial pressure level at 1 km? (b) At 2000 m? (c) At what distance will the axial pressure level be reduced to 100 dB? (d) At what distance will TL(geom) equal TL(losses)? (e) At what distance is the rate of transmission loss associated with spherical divergence equal to that associated with absorption?
Transcribed Image Text:15.3.2. A 30 kHz sonar transducer produces an axial sound pressure level of 140 dB re 1 μPa at a distance of 1000 m in seawater. Assume spherical spreading and losses. (a) What is the axial pressure level at 1 km? (b) At 2000 m? (c) At what distance will the axial pressure level be reduced to 100 dB? (d) At what distance will TL(geom) equal TL(losses)? (e) At what distance is the rate of transmission loss associated with spherical divergence equal to that associated with absorption?
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