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DynamEQ
ANALOG features, superior performance analog prices
evolution DynamEQ
evolution DynamEQ® technology
Gennum Corporation been providing hearing instrument industry with leading edge technology more than years. Through excellence innovation company helped hearing impaired creating many products groundbreaking electrical mechanical design.
DynamEQ® technology become synonymous with dependable design solutions outstanding performance, always delivering great sound quality exceptional flexibility. Since introduction first DynamEQ® product 1992, over million parts incorporating DynamEQ® technology have been sold. DynamEQ®I Introduced 1992
DynamEQ®II
Introduced 1995
Channel TILL Twin Average Detection
DynamEQ®III
Multi Channel Compression Variable
Introduced 2000
More Flexible AGC-O Level Expansion Acoustic Feedback Management
Analog
DynamEQ®III delivers familiar functionality predecessors, DynamEQ®II DynamEQ®I more.
Being truly sophisticated analog product, DynamEQ®III provides features flexibility that until were expected only from digital designs such feedback management tops specs when comes input dynamic range (over 90dB) handling high inputs dBSPL). Through creative signal processing, called Post Emphasis, there increased audibility environments containing intense frequency sounds.
Frequency shaping match target audiograms easier using DynamEQ®III. example, especially good results achieved when matching target curves.
Hearing designers accustomed flexibility DynamEQ®II product, will realize that even greater fitting flexibility achievable with DynamEQ®III based design solution. With highly successful DynamEQ®II WDRC channel system starting point, DynamEQ®III also features independent channel gain. Through selectable gain settings return linear point curve greatly varied, thus allowing match highly complex audiograms. DynamEQ®III includes squelch circuit which attenuates microphone circuit noise quiet environments where high gain conditions exist. also features distortion compression limiting AGC-O notch filter acoustic feedback management. Post Emphasis filters further minimize potential interference from very frequency environmental sounds.
There eight fitting parameters available program: Frequency Gain High Frequency Compression Ratio AGC-I Threshold Kneepoint Volume Control High Frequency Gain Band Split Filter Crossover Frequency AGC-O Threshold Notch Filter Frequency
DynamEQ®III
next step DynamEQ® sound processing technology with enhanced flexibility features.
OUTPUT (dBV)
-100
16-step adjustable gain both channels
INPUT (dBV)
GAIN (dB)
Notch filter reduce acoustic feedback
FREQUENCY (Hz)
OUTPUT (dBV)
AGC-O output limiting
INPUT (dBV)
Squelch
OUTPUT (dBV)
-110 Squelch
Soft squelch
-105 -100
INPUT (dBV)
Frequently Asked Questions
does feedback management work? notch filter tuned during fitting frequency where unwanted feedback occurs. filter provides maximum attenuation 11dB. What been done about microphone noise input levels? Enabling squelch action results significant reduction perceived noise. compression fixed channel?
engineering compromise made. channel, either gain compression could adjustable. Based audiological statistics plus requirements, Gennum concluded that compression ratio channel, conjunction with variable return linear, would enable customers create better solutions hearing impaired. DynamEQ retrofit/mimic DynamEQ
Yes. electrical features DynamEQ present DynamEQ more. Further, resemblance size layout this product thinSTAXDynamEQ products (GA3201, GA3204) makes retrofitting mechanically easy.
dBHL
1000
2000 5000
Frequency
Real (dB)
Audiogram
1000
2000100 5000
Frequency
Targets
Real (dB)
1000 2000 5000
Frequency
DynamEQ®III Match
Available features
WDRC, Channel with Compression Band Split Filter True TILL True BILL 1:1-4:1 Adjustment Twin Average Detection Non-Programmable Option Programmable Option Multi Memory Option Compatible Option Independent Channel Gain Output Limiting Input Dynamic Range Bandwidth 16kHz Feedback Management Level Expansion (for Noise Reduction)
High Freq. only 6dB/oct
Both 12-24dB/oct
Both 24dB/oct
Fixed
AGC-O
Typical
75dB 8kHz
Notch Filter
$-$$
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GENNUM CORPORATION P.O. 489, Station Burlington, Ontario, Canada hipinfo@gennum.com www.gennum.com fax: +01-905-632-2814 tel: +01-905-632-2996
BR538 September 2000 Printed Canada
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