Insert earphones ER-3C, 50 Ohm by Etymotic Research

Set Insert earphones ER-3C, 50 Ohm with accessories by Etymotic Research
ER-3C™ Plug-in earphones are the next generation of insert earphones and replace the ER-3A insert earphones, which have been the worldwide standard for audiometric insert earphones since 1985.
The frequency response and performance characteristics of the ER-3C headphones are almost identical to those of the original ER-3A headphones at all audiometric frequencies.

Advantages of the ER-3C headphones:
- Touch-proof" electrical connection for safety.
- same smooth frequency response as ER-3A
- Provides 30+ dB external noise attenuation - equivalent to a single-wall cabin when used with deep-sealed foam earplugs.
- Provides 70+ dB isolation (interaural attenuation) between ears; reduces the need for masking.
- Reduces the variability of tests and repetitions compared to supra-aural earphones.
- Eliminates test errors due to collapsed auditory canals
- Simplifies RECD measurements (Real Ear to Coupler Difference)
- Can be calibrated in a 2 cm coupling, a closed ear simulator or a 0.4 cm coupling.

Scope of delivery: ER-3C headphones (50 Ohm), 7" cable with Dual-Mono 6.33 mm (1/4") connectors, 20 foam earplugs (normal, 13 mm), 20 foam earplugs (small, 10 mm), 2 foam earplugs (large, 18 mm), Velcro neck strap
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