Widex Senso Plus BTE C9+ Technical Guide von Hearing Planet

Weitere Hearing Planet Kataloge | Widex Senso Plus BTE C9+ Technical Guide | 6 Seiten | 2006-11-22


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Katalog Widex Senso Plus BTE C9+ Technical Guide

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Health & Beauty > Medical Special Needs > Hearing Assistance

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Hearing Planet, Widex Senso Plus BTE C9+ Technical

fully digital directional bte · 3 channel dsp with · loudness mapping · sound stabilizertm · speech enhancement · speech intensification systemtm · in-situ sensogram fitting system · automatic feedback management · directional microphone recommended for · mild to severe hearing losses · all configurations of hearing loss including ski-slope sloping flat and reverse slope losses · people who desire a fully automatic aid with no manual controls suggested fitting range the senso c9 is a 100 digital hearing aid with a dedicated dsp digital signal processor utilizing over 20 bit representation of the signal maximum bit depth is 32 bits and 32 khz sampling frequency senso c9 offers all the senso advantages · 3 channel compression with adjustable crossover frequencies to maximize fitting

· loudness mapping to compensate for recruitment · sound stabilizertm for smooth gain transition in-situ sensogram fitting to increase accuracy of fit · automatic feedback manager to minimize feedback · speech enhancement algorithm to increase listening comfort and ease in noise · speech intensification systemtm offers additional focus on speech signals in noisy environments · expansion processing to minimize microphone noise · extended input dynamic range to allow input levels of up to 100 db spl without saturation/distortion · automatic output control aoc to ensure low distortion at high output levels · highly efficient ddd digital output amplifier to achieve long battery life 415 hours from a size 13 battery and high mpo 125 db spl · low battery beep-tone indicator to alert battery replacement is needed · separate a/d converter for inductive input to allow equalization for microphone response and adjustable sensitivity · anti-hum filter to minimize line noise i.e 60hz

a aoc disabled b aoc enabled measurements the advanced signal processing algorithms used in senso make results of direct conventional measurements variable and difficult to interpret special considerations are necessary in making these measurements for quality control and service purposes a special test mode has been defined that allows inspection of the electroacoustic integrity of the hearing aid s components the test mode can be accessed from both the lp2 programmer and the compass software senso directional the signal processing algorithms in the senso work in synergy with a dedicated directional microphone in addition to providing a comparable signal to-noise ratio snr improvement as a dual microphone system1 the low compression kneepoint of the senso allows wearers to hear sounds coming from behind without switching between microphones2 compared to a two microphone system the dedicated microphone is more stable as it does not rely on close matching between microphones loudness

unlike typical wdrc systems which use fast regulation time to achieve a nonlinear gain function loudness mapping uses long adaptive regulation time and allows an almost linear reproduction of speech this maintains the temporal and spectral fine-structure and keeps intelligibility and clarity of reproduction at the highest level while keeping amplification of environmental noise at a minimum loudness mapping works independently in all three channels amplification of sounds in one channel will not influence amplification in the other channels sound stabilizertm in traditional automatic hearing aids fast gain adjustment is used to adapt to intensity changes in the environment however fast gain adjustment often causes annoying effects which seriously degrades listening comfort and speech comprehension slow gain adjustment eliminates these effects but under some conditions they may introduce silent periods if the intensity changes too rapidly sound stablizertm applies dynamic control of

has been designed to accept input levels of 100 db spl without saturation and distortion ddd ­ direct digital drive the 100 digital output stage increases the output efficiency compared to class b output amplifiers this allows higher maximum output than otherwise possible with the small hearing aid receivers this efficiency also translates into lower power consumption battery life of around 415 hours can be expected from a size 13 zincair cell distortion is kept to a minimum and sound clarity a maximum low battery beep-tone indicator this system alerts the wearer when the battery is near exhaustion clear audible beep tones at a level equivalent to a 70 db spl input are produced when it is time to replace the cell telecoil the telecoil and the microphone in senso have separate a/d converters this allows filtering of the inductive input without any analog pre-amplifiers that is why senso can offer both equalization of the telecoil response so that it has the same sensitivity as the