Computer software for digital audio restoration, acoustic echo cancellation, speech recognition and audio signal separation; digital audio players that restore recordings to greater clarity; acoustic echo cancellation apparatus; speech recognition receiver-transmitters; acoustic separation units; semiconductor chips; silicon chips

'acoust':7,25,34 'apparatus':28 'audio':5,13,17 'cancel':9,27 'chip':38,40 'clariti':24 'comput':1 'digit':4,16 'echo':8,26 'greater':23 'player':18 'receiv':32 'receiver-transmitt':31 'recognit':11,30 'record':21 'restor':6,20 'semiconductor':37 'separ':15,35 'signal':14 'silicon':39 'softwar':2 'speech':10,29 'transmitt':33 'unit':36

ASPINE

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