Audiometric Earphones TDH-39P Telephonics

Original Telephonics Audiometric earphone TDH-39P.
The Telephonics TDH39 headphones are used with the following audiometers: SIEMENS Unity2, MADSEN Aurical Hipro, MADSEN Astera, MADSEN Itera II, MADSEN XETA, MADSEN Micromate 304, MADSEN Midimate 622, AURICAL.

Specifications:
Receiver Type: Dynamic, with metal diaphragm
Impedance: TDH-39P - 10 ohms
Frequency Response: 100 Hz to 8000 Hz
Continuous Power Rating: 300 mW at any single frequency in the 100 Hz to 8000 Hz range
Linearity: Linearity for power inputs from 0 to 400 mW
Sensitivity: TDH-39P - 108 dB + 4 dB SPL (reference: 0 dB=20 µPA) Output with
1 mW watt input at 1 KHz
Distortion: Less than 1 percent

Telephonics Corporation, a member of the Acoustical Society of America, is the world's leading manufacturer of audiometric quality earphones. The TDH Series earphones conform to the ANSI S-3.6 1989 specifications, and are loudness balanced with the reference threshold sound pressure levels on the 9A coupler recorded in the ANSI standard. The earphones are optimally designed to provide high sensitivity, low distortion, and a wide, Smooth frequency response, and can be ordered individually or in matched pairs. Because of their consistent performance and durability, the TDH Series earphones are suitable for calibration of audiometric equipment.

Shipment: 2 converters TDH-39P, headband, 2 ear pads, cable with 2 x 6.3 mm jack-plug. Impedance: 10 Ohm
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