{"id":267,"date":"2009-01-24T12:46:29","date_gmt":"2009-01-24T12:46:29","guid":{"rendered":"https:\/\/www.garfnet.org.uk\/cms\/sound-pressure-levels\/"},"modified":"2026-09-05T01:09:21","modified_gmt":"2026-09-05T01:09:21","slug":"sound-pressure-levels","status":"publish","type":"page","link":"https:\/\/garfnet.org.uk\/cms\/tables\/general\/sound-pressure-levels\/","title":{"rendered":"Sound pressure levels"},"content":{"rendered":"

This table shows sound pressure levels in decibels and what this means in terms of intensity and power ratios.<\/b><\/p>\n

Sound pressure level in dB SPL<\/span><\/a><\/div><\/th>
Intensity relative to 0 dB<\/span><\/a><\/div><\/th>
Pressure relative to 20 \u00b5Pa<\/span><\/a><\/div><\/th>
Base-10 exponent of pressure ratio<\/span><\/a><\/div><\/th>
RMS sound pressure in mPa<\/span><\/a><\/div><\/th>
Natural logarithmic pressure ratio<\/span><\/a><\/div><\/th><\/tr><\/thead>
-96<\/div><\/td>
2.512 \u00d7 10-10<\/sup><\/div><\/td>
1.585 \u00d7 10-5<\/sup><\/div><\/td>
-4.8000<\/div><\/td>
3.17 \u00d7 10-7<\/sup><\/div><\/td>
-11.052636<\/div><\/td><\/tr>
0<\/div><\/td>
1<\/div><\/td>
1<\/div><\/td>
0.0000<\/div><\/td>
0.02<\/div><\/td>
0<\/div><\/td><\/tr>
10<\/div><\/td>
10<\/div><\/td>
3.16227766016838<\/div><\/td>
0.5000<\/div><\/td>
0.0632455532033676<\/div><\/td>
1.151293<\/div><\/td><\/tr>
20<\/div><\/td>
100<\/div><\/td>
10<\/div><\/td>
1.0000<\/div><\/td>
0.2<\/div><\/td>
2.302585<\/div><\/td><\/tr>
30<\/div><\/td>
1000<\/div><\/td>
31.6227766016838<\/div><\/td>
1.5000<\/div><\/td>
0.632455532033676<\/div><\/td>
3.453878<\/div><\/td><\/tr>
40<\/div><\/td>
10000<\/div><\/td>
100<\/div><\/td>
2.0000<\/div><\/td>
2<\/div><\/td>
4.60517<\/div><\/td><\/tr>
50<\/div><\/td>
100000<\/div><\/td>
316.227766016838<\/div><\/td>
2.5000<\/div><\/td>
6.32455532033676<\/div><\/td>
5.756463<\/div><\/td><\/tr>
60<\/div><\/td>
1000000<\/div><\/td>
1000<\/div><\/td>
3.0000<\/div><\/td>
20<\/div><\/td>
6.907755<\/div><\/td><\/tr>
70<\/div><\/td>
10000000<\/div><\/td>
3162.27766016838<\/div><\/td>
3.5000<\/div><\/td>
63.2455532033676<\/div><\/td>
8.059048<\/div><\/td><\/tr>
80<\/div><\/td>
1 \u00d7 108<\/sup><\/div><\/td>
10000<\/div><\/td>
4.0000<\/div><\/td>
200<\/div><\/td>
9.21034<\/div><\/td><\/tr>
90<\/div><\/td>
1 \u00d7 109<\/sup><\/div><\/td>
31622.7766016838<\/div><\/td>
4.5000<\/div><\/td>
632.455532033676<\/div><\/td>
10.361633<\/div><\/td><\/tr>
100<\/div><\/td>
1 \u00d7 1010<\/sup><\/div><\/td>
100000<\/div><\/td>
5.0000<\/div><\/td>
2000<\/div><\/td>
11.512925<\/div><\/td><\/tr>
110<\/div><\/td>
1 \u00d7 1011<\/sup><\/div><\/td>
316227.766016838<\/div><\/td>
5.5000<\/div><\/td>
6324.55532033676<\/div><\/td>
12.664218<\/div><\/td><\/tr>
120<\/div><\/td>
1 \u00d7 1012<\/sup><\/div><\/td>
1000000<\/div><\/td>
6.0000<\/div><\/td>
20000<\/div><\/td>
13.815511<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n
\n

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This table shows sound pressure levels in decibels and what this means in terms of intensity and power ratios. 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