Acceptable Audiometric Hearing Level (Present American Standard) For Appointment | |||||||||||
250 | 500 | 1000 | 2000 | 3000 | 4000 | 6000 | 8000 | ||||
256 | 512 | 1024 | 2048 | 2896 | 4096 | 6144 | 8192 | ||||
a. | Both ears. . . . | (1) | Average of six readings in these speech frequencies not greater than 20 decibels with no level greater than 25 decibels. (divide by six) | (2) | 50 | (2) | (1) | ||||
or | |||||||||||
b. | Better ear. . . . | (1) | 15 | 15 | 15 | (2) | 30 | (2) | (1) | ||
Worse ear. . . . | (1) | (1) | (1) | (1) | (1) | (1) | (1) | (1) | |||
(1) No requirement (2) Not yet standardized | "Better ear" is interpreted to mean the ear with better hearing at the frequency level being tested. | ||||||||||
CONVERSION TABLE | ||||||
ASA | ISO | |||||
Hz | Db | Hz | Db | |||
500 | 15 | 500 | 30 | |||
1000 | 15 | 1000 | 25 | |||
2000 | 15 | 2000 | 25 | |||
4000 | 30 | 4000 | 35 | |||