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A 10 dB change is a power of 10. If inverse square holds, a 1/100 change in dB would be a -20 dB change. So, 130 becomes 110. Comparing 110 to 118, is an 8 dB difference, which is a little less than 8 times the power (9 dB = factor of 8).
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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