GOST R IEC 60118-7-2013 Electroacoustics Hearing aids Part 7 Measurement of the performance characteristics of hearing aids for production supply and delivery quality assurance pur.pdf

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6、 ; (sound pressure level; SPL): (), 20 . 3.2 ; (high-frequency average; HFA): 1000, 1600 2500 . 3.3 (special purpose hearing aid): , 1000 1600 , 2500 15 . , . , , . 3.4 ; 3 (special purpose average; SPA): 3- . , . , 3 . 3.5 (acoustic gain): , , , . 3.6 (gain control): , , . 3.7 , 90 ; 90 (output SPL

7、 for 90-dB input SPL; OSPL90): , , 90 , . , , 90 , . , 90 , 90 . 3.8 90; 90 (high-frequency average OSPL90; HFA-OSPL90): 90. 3.9 ; (high-frequency average full-on gain; HFA-FOG): , 50 , . 3.10 ; (reference test setting of the gain control; RTS): , 60 , , , 1,5 90 77 . , 60 , , 90 77 , . , 60 , 17 90 , 65 , , 90. 3.11 ; (reference test gain; RTG): , 60 , . 3.12 - (input-output function): , . 3.13 ; (automatic gain control; AGC): (, ),