Motorola Voiceducer MDRMN4044 Manual page 7

BASIC OPERATION OF YOUR VOICEDUCER
Introduction
The VOICEDUCER provides two-way communications from a small
device worn in the ear. The accelerometer microphone provides a
signal-to-noise ratio equal to or exceeding the best noise-canceling
microphones, which enables voice clarity to be maintained under
conditions of high ambient noise. In the event hearing protection is
required, the earpiece is small enough to wear under earmuffs. When
suitable earmuffs are used, the operating range of the earpiece may
be extended up to 125 dB noise levels. Otherwise, the user retains
the ability for direct hearing and speaking under normal ambient
noise conditions. The user's face is left unobstructed. In fact, the ear
microphone provides completely clear, intelligible voice transmissions
even in situations where the mouth is obstructed or speech is muffled
by protective clothing, a face guard or breathing apparatus. The user
consequently is afforded a much greater degree of freedom than has
previously been possible with two-way radios.
When properly inserted in the ear, the earpiece should feel
comfortable and secure. The ear microphone detects speech-induced
bone vibrations via direct contact with the ear canal wall. Thus, the
speech conduction process takes place entirely inside the head.
Because these vibrations occur whether one speaks softly or yells,
you only have to speak at a moderate level for high speech clarity,
even in high noise areas. It is not necessary to yell above the
background noise in order to be understood. In addition, the ear
microphone utilizes a quality sound-pressure receiver making radio
transmissions easy to hear under noisy conditions.
Ear Microphone Installation
1. Unscrew the battery hatch
on the bottom of the
interface module and insert
a fresh alkaline battery
(AAA 1.5V).
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