Description

The MinusNine is a miniature, inductively-coupled wireless earphone utilising an advanced digital microelectronics platform running custom software. It produces outstanding speech quality, reduced interference levels, precise output level control and is anatomically profiled to fit deep into the ear canal making it discreet, secure and usable in the left or right ear. Special functions include soft-squelch, automatic gain control and low battery alarm. It has a button encoder to scroll through 4 volume levels which also change the audio characteristics to maintain intelligibility and low levels. The MinusNine is robust and designed to operate in hostile environments and incorporates a hygienic user-replaceable cerumen (earwax) filter system. Design emphasis has been placed on its ability to suppress interference; typically generated by data systems in vehicles, TDMA noise from TETRA/P25 terminals and Cellphones as well as mains-borne noise from electric motors, neon signs and power lines. A full range of compatible neckloops, shoulder loops and brooch inductive transmitters is available to operate with the MinusNine wireless earphone.

Specification

• Frequency Range: 300-3000Hz

  DSP Type: Digital Hybrid, DSP and EEPROM with custom Firmware & Software

  Distortion: <10% @ 1kHz

  Volume Control: Push button encoder sequentially scolling through 4 volume or program changes

  Receiver: Magnetic moving armature

  Max Output Sound Pressure Level (2cc coupler) @1kHz:96dB ±2dB or preset to customer requirement

  Quiescent Noise Control (no audio input): Soft Squelch. Hard Squelch option

  Quiescent Noise (Soft Squelch): 35dB (With hard squelch option quiescent is silent)

  End of Battery Life: Audible Beep

  Battery: 1.4 VDC A10 Zinc Air or Equivalent

  Minimum Operating Voltage: 1.1 VDC

  Typical Battery Life (A10 Zinc Air):>50 hours

  Sensitivity (Standard): 75dB@1kHZ ±3dB/10mA/M

  Size: Nominal max, Length:15mm x Width:8mm

  Weight (including battery): 1.75 grams inc. battery

  Operating Temperature Range: -10°C to +40°C

  Cerumen Filter Type: Replaceable Mesh Filter

  Colour Options: Beige, Mid Brown, Dark Brown

  Custom Fit Option: Available at additional charge. Ear impressions required

  CE Conformity: 89/336/EWG-Electromagnetic Compatibility

  ROHS & WEEE: ROHS: Compliant. WEEE: Compliant