Audio apparatus, namely, headphones; Software and firmware for headphones for changing the sound quality and measuring the sound output; Software applications for mobile devices to control and adjust the audio control functions in headphones; Software to control and improve audio equipment sound quality

'adjust':28 'apparatus':2 'applic':21 'audio':1,30,40 'chang':11 'control':26,31,37 'devic':24 'equip':41 'firmwar':7 'function':32 'headphon':4,9,34 'improv':39 'measur':16 'mobil':23 'name':3 'output':19 'qualiti':14,43 'softwar':5,20,35 'sound':13,18,42

[ Medical hearing instruments; hearing protectors without the ability to reproduce or transmit sound ]

'abil':8 'hear':2,4 'instrument':3 'medic':1 'protector':5 'reproduc':10 'sound':13 'transmit':12 'without':6

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