Sound propagation, transmission, dissemination and reproduction apparatus, namely, public address system, stage loudspeakers, cinema screen speakers; sound directivity control devices, namely, waveguides and acoustic horns; sound amplifiers; sound processors; sound card; acoustic conduit; loudspeaker enclosures; audio amplifiers

'acoust':24,32 'address':10 'amplifi':27,37 'apparatus':7 'audio':36 'card':31 'cinema':14 'conduit':33 'control':19 'devic':20 'direct':18 'dissemin':4 'enclosur':35 'horn':25 'loudspeak':13,34 'name':8,21 'processor':29 'propag':2 'public':9 'reproduct':6 'screen':15 'sound':1,17,26,28,30 'speaker':16 'stage':12 'system':11 'transmiss':3 'waveguid':22

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