RADIOEAR DD450 circumaural headset 3.5mm Audiometry noise cancelling Headphone

Description

RadioEar DD450 Circumaural Headset
Model# DD450-8509294 P4622
In excellent condition.
used condition minor wear, no original packaging
tested working
* CAN BE USED AS REGULAR NOISE CANCELLING HEADPHONES .
The DD450 is a circumaural headset that can be used for audiometry testing in the standard audiometry range 125 Hz - 8 kHz as well as high-frequency testing up to 20 kHz. The DD450 complies with IEC-60645-1 and ANSI S3.6 up to 16 kHz.
When using an IEC60318-1 coupler with a type 1 adaptor on an artificial ear, the standard allows for calibration using the RETSPLs.
RoHS compatible
Good ambient noise isolation
Gold-plated connectors
Capable of full range testing
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