
MinusNine Digital with Volume Control
MinusNine miniature, inductively-coupled wireless earphone with Volume Control
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
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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