Item:Q8014: Difference between revisions
Created a new Item: active noise control, method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first |
Created claim: uses (P36): negation (Q1339) |
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| Property / subclass of: noise control / rank | |||
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| Property / has use: soundproofing / rank | |||
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| Property / uses: negation / rank | |||
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