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New insert earphones for audiometry
https://www.etymotic.com/wp-content/uploads/2021/05/erl-0003-1984.pdf
of the new insert earphones, designated the ER-I and ER-2 Tubephones, have been designed. These differ only in their frequency response. For speech audiometry, where the goal is to pro- duce the same frequency response at the eardrum for speech as would be pro- duced in the live situation, the frequen- cy response shown as the dotted curve
Insert Earphones for Audiometric Testing | Occupational ...
https://www.osha.gov/laws-regs/standardinterpretations/2017-06-09
Based on a recommendation from the National Institute for Occupational Safety and Health (NIOSH) to OSHA, the use of insert earphones is acceptable when obtaining audiograms. OSHA will allow the use of ANSI MPANL’s when insert earphones are used for audiometric testing.
US4677679A - Insert earphones for audiometry - Google …
https://patents.google.com/patent/US4677679A/en
Insert earphones, which are especially useful for audiometry applications include a transducer which is coupled to a resonance cancellation tube as well as …
Use of insert earphones for audiometric testing ...
https://www.osha.gov/laws-regs/standardinterpretations/1993-08-31-2
Employers who want to use insert earphones must enter the 7 dB shift information in the employee's audiometric test records although it is not an "STS". When the next annual audiogram using insert earphones shows an average threshold shift at 2000, 3000 and 4000 Hz of 3 dB, completing the full shift (7 dB + 3 dB), employers must then label that average shift as …
ER3C Insert Earphones - Etymotic
https://www.etymotic.com/product/er3c-insert-earphones/
ER3C earphones are the next generation of insert earphones, replacing ER•3A earphones, which have been the worldwide standard for audiometric insert earphones since 1985. The frequency response and performance characteristics of ER•3C earphones are virtually identical to the original ER•3A earphones at all audiometric frequencies. 10 Ohm or 50 Ohm model available. …
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