In-flight noise reduction systems for airline passengers comprising recorded and downloadable software for use in operating and controlling an in-flight noise reduction system, computer hardware, electronic controllers, microphones and audio speakers

'airlin':8 'audio':34 'compris':10 'comput':28 'control':20,31 'download':13 'electron':30 'flight':3,24 'hardwar':29 'in-flight':1,22 'microphon':32 'nois':4,25 'oper':18 'passeng':9 'record':11 'reduct':5,26 'softwar':14 'speaker':35 'system':6,27 'use':16

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