PPRuNe Forums - View Single Post - Passive ANRs: when things go bad!
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Old 17th Oct 2011, 16:33
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soay
 
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Originally Posted by Jan Olieslagers
Am I missing something or are batteries only required for active noise reduction?
Yes, batteries are only required for ANR, and the title of this thread ("Passive ANR") is an oxymoron.
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