to the Xenon end-user brochure

Models In The
Xenon Range
Xenon
Hearing Systems
*nominal
Xenon VC
Xenon Plus
Behind-The-Ear Hearing System
Behind-The-Ear Hearing System
13
13
3.6g
3.6g
12x8x37mm
12x8x37mm
Xenon Dir
Xenon PP
Behind-The-Ear Hearing System
Behind-The-Ear Hearing System
13
675
3.6g
6.6g
12x8x39mm
14x8x46mm
Xenon XS
Xenon SM VC
Behind-The-Ear Hearing System
In-The-Canal Hearing System
13
10A/312
3.6g
2.5g*
17x12x32mm
10x6x18mm*
Xenon SM Plus
Xenon CIC
In-The-Canal Hearing System
Completely-In-The-Canal Hearing System
10A/312
10A
2.5g*
2.0g*
10x6x18mm*
8x6x15mm*
Why Digital?
The previous generation of hearing
aids utilised amplification systems
based on analogue electronic technology. These hearing aids
simply took the sounds and noises that they "heard" and
amplified them. That meant amplifying unwanted signals also.
It was possible to apply some limiting factors to the output
sound levels of these hearing aids but in general, although
they were an excellent solution for the patients, the opportunity
to use Digital Signal Processing was a huge breakthrough.
Digital Signal Processing allows us, the manufacturer, to do just
that:- "process" the signals that are received by the hearing aid.
This means that we can manipulate the incoming sound, and
transform it into what the user feels most comfortable with. We
can reduce unwanted noise, and concentrate on providing the
user with clearer speech signals.
Available from:
www.dac.puretone.net
Puretone Ltd, 9-10 Henley Business Park, Rochester, Kent. ME2 4FR. England.
t: +44 (0)1634 719427 f: +44 (0)1634 719450
e: [email protected] w: www.puretone.net
Welcome to DAC
from Puretone
DAC
Features of Xenon
Hearing Systems
Digital
Audio
Chemistry
The Puretone
DAC (Digital Audio Chemistry) range has been
Xenon
Hearing Systems
100% Digital Signal Processing (DSP)
specifically designed for a multitude of hearing losses and user
3 DSP channels
applications to suit all environments. Its specialised circuitry
14 frequency band tuning
and processor ensure crystal clear sound in all situations.
Advanced speech management system
Speech is amplified while excess background noise
picked up by the microphone is reduced.
Speech Management System
Microphone noise reduction
Xenon - 3-Channel, 14-Band Hearing Systems
Independent adjustment for soft and loud sounds
3 channels with Speech Management System (SMS),
Manual volume control option
Microphone Noise Reduction (MNR) and Feedback Manager.
Adjustable compression ratio
1 to 3 comfort programs (dependent upon model), 14
Adjustable threshold kneepoint
frequency bands (7 adjustable), WDRC in 3 channels and
wide-range AGCo make these sophisticated instruments
extremely versatile and suitable for most users’ preferences.
The Speech Management System digitally manages environmental
sound in order to, for example, increase the clarity of speech in a
noisy environment such as a party. It will suppress distorting noise
and works independently in each of the AGCi channels.
AGCi: Input Controlled Automatic Gain Control
Digital volume control option
Directional twin microphone option
Feedback management
Multiple program selection option
Feedback Manager
Feedback (whistling) is caused by amplified sound being fed
2.8 MHz processor speed
30-bit resolution
back into the hearing aid receiver, being amplified again, and
being fed back in again. This phenomenon normally happens
Electronic noise from the hearing system is
cancelled out by the MNR circuitry.
Microphone Noise Reduction
at the resonant frequency of the auditory canal (about 3 KHz.)
The feedback manager dampens this frequency (and
frequencies adjacent to it) to prevent feedback occurring.
In cases where the patient has a mild hearing loss, it is possible
that they will be able to hear the actual circuit noise generated in
the hearing aid in a quiet environment. MNR circuitry cancels out
this noise and provides the user with a quiet hearing aid.