TWO-CHANNEL AUDIOMETER Russian patent published in 2025 - IPC A61B5/12 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment and can be used for subjective assessment of the degree of hearing loss. Audiometer comprises series-connected: first address sensor of periodic function (4), first unit for calculating periodic function (19), first switch (18), first multiplier (12), first adder (11), first phase calculation unit (17), first amplitude computing unit (25), second multiplier (27), first digital-to-analogue converter (34), first low-pass filter (38), first controlled attenuator (47), first controlled switch (48), as well as series-connected first pseudorandom sequence length sensor (3) and first pseudorandom sequence generating unit (13), series-connected first signal duration code sensor (6) and first variable-division ratio divider (20), first frequency range code sensor (2), series-connected first amplitude-modulating function address sensor (29) and first amplitude-modulating function calculating unit (28), connected in series: first intensity code sensor (54), second adder (44), first comparison circuit (45), second switch (46), first tested ear code sensor (39) and clock pulse generator (30). The device also has series-connected: second address sensor of periodic function (7), second unit for calculating periodic function (22), third switch (23), third multiplier (15), third adder (16), second phase calculation unit (24), second amplitude calculating unit (26), fourth multiplier (33), second digital-to-analogue converter (35), second low-pass filter (41), second controlled attenuator (50), second controlled switch (49), as well as series-connected second pseudorandom sequence length sensor (8) and second pseudorandom sequence generating unit (14), series-connected second signal duration code sensor (6) and second divider with variable division ratio (21), second frequency range code sensor (9), second initial frequency code sensor (10), series-connected second amplitude-modulating function address sensor (31) and second amplitude-modulating function calculating unit (32), connected in series: second intensity code sensor (57), fourth adder (53), second comparison circuit (52), fourth switch (51), second tested ear code sensor (40), first signal adder (55).

EFFECT: generation of test, masking and reference signals required for conducting threshold and above-threshold audiometric tests.

1 cl, 1 dwg