PPRuNe Forums - View Single Post - Noise Signature 429 vs 135 vs 130
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Noise Signature 429 vs 135 vs 130
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23rd Jun 2021, 11:36
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aa777888
Join Date: Apr 2010
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Interesting. Barely a dB difference between them. Form follows function follows regulation, I guess. Don't forget it takes a 10dB difference in SPL to sound twice (or half) as loud to human ears.
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