Demo Powerpoint

advertisement
Highlights
Key Features
• New High Performance 130-nanometer CMOS DSP Hardware
• Reliant™ Adaptive Feedback Cancelling
• 12-channel Layered Noise Reduction™
• 8-channel WDRC compression with adaptive time constants
• 8-channel Output Limiting
• Adaptive Directional Processing
• Event Data Logging
• Random Noise Generator for Tinnitus therapy
• Digital VC Compatibility
• Same pad footprint as previous nanoDSP Amplifiers
Hardware Block Diagram
Ezairo™ 5900 Programmable Integrated Audio DSP
Ezairo is a trademark of AMI Semiconductor
Highlights
Ezairo 5900 Benefits
• High Precision Sound – 24-bit precision computing
• Optimized Dual Core Computing Power
• Ultra High Audio Fidelity
• Ultra-low power consumption
• Unmatched Flexibility
• Fast Time to Market – Best-in-class Development tools
3rd Generation AFC
Reliant™ Adaptive Feedback Cancellation
• Our 3rd generation of industry-leading AFC technology
• A product of 18 months of theoretical and laboratory research.
• Faster adapting speed means less squeaking even when things move
around the ear.
• More Added Stable Gain – typically 6 dB more than inTune for open
fittings.
• State-of-the-art anti-entrainment compensation.
• Bandwidth extended down to 750 Hz means 5 dB more added stable
gain for typical BTE fittings with earmolds.
2nd Generation Noise Reduction
Reliant AFC Response Time versus ASG
Open Canal - reflective surface moving near ear
5
Squeal Time (sec)
inTune - moving in
inTune - moving out
Ethos - moving in
Ethos - moving out
What this graph means:
4
• It shows the adapting time to changing
reflective surface for a given amount of
added stable gain.
3
• It shows that Ethos can achieve more
ASG for a given adapting time.
2
• At 1 second adapting time, Ethos allows
6 dB more added stable gain.
1
• Ethos can achieve ASG levels into the
low-to-mid 20’s for longer adapting
times.
6dB more ASG
0
8
10
12
14
Added Stable Gain (dB)
16
18
20
Have you hugged your KEMAR today?
Adaptation Speed of Ethos versus inTune amplifiers
start of hug
end of hug
start of hug
Test Conditions:
• Open canal test fitting on KEMAR ear
• Recorded in quiet background (~45 dBA)
• Same microphone and receiver used for both conditions
• Amplifiers matched for gain, frequency and compression
end of hug
Adaptation Speed of Ethos versus inTune amplifiers
phone handset
moved towards
ear
phone handset
moved away
from ear
phone handset
moved towards
ear
Test Conditions:
• Open canal test fitting on KEMAR ear
• Recorded in quiet background (~45 dBA)
• Same microphone and receiver used for both conditions
• Amplifiers matched for gain, frequency and compression
• Gain set with added stable gain of ~12dB
phone handset
moved away
from ear
2nd Generation Noise Reduction
12-channel Layered Noise Reduction™
• The state-of-the-art solution to reduction of environmental noise:
 Separate actions for noise embedded in speech and environmental
background noise.
 Twelve noise reduction channels gives better noise selectivity.
 Four settings available: Low (7dB), Medium (10dB), High (13dB)
and Max (17dB). The new Max setting helps for extreme noise
situations where speech intelligibility is more important than speech
quality.
 Extended frequency range of action to 7750 Hz. for improved
performance in open-ear fittings, compared to inTune with 4250 Hz
bandwidth.
 Increased noise reduction action for low intensity noise.
2nd Generation Noise Reduction
Eight-Channel Wide-Dynamic-Range Compression
• Multi-channel compression allows quiet sounds to be amplified to
audible levels but reduces the amplification for louder sounds –
separately in 8 frequency regions.
• Proprietary technology called Dynamic Contrast Detection™ –
automatically switches attack and release time depending on
environment.
• In each channel, maximum output is also controlled by compression
limiting to make sure loud sounds are tolerable over the whole
frequency range. The MPO limit is programmable over a 20dB range.
2nd Generation Noise Reduction
Adaptive Directionality with Variable Threshold
• Automatically adjusts from Omni to Directional mode
 In situations with significant competing noise, the amplifier automatically recognizes
that directional mode will work better, and makes the transition without user action.
• Adjustable adaptive threshold
 settings are 50, 55, 60, and 65 dB SPL input referred level
 allows tuning to the environmental needs or type of hearing aid.
• Eliminates the need for a separate directional program
 User does not have to make a choice
 Clinical training is simpler
Event Data Logging
• Logged events: Power-on, VC change and position, Program change
and position, and Low-battery Warnings.
• Events are recorded and ‘time stamped’ with elapsed-time clock
value.
• All events will be logged in a circular buffer available to the fitting
system – about 500 events can be stored.
• Fitting system software can present the event recordings to help the
dispenser understand usage patterns.
Examples:
Random-noise Generator
Digital Random Noise Generator
• Digital generation of random noise gives a clean noise sound for
masking use.
• Can be used in mixed-mode applications: one program for masking,
and another program for hearing aid use.
• Noise is injected at the input, so it can be shaped by the existing EQ
gain adjusters.
Examples:
Flat Noise
Spectrum
High Frequency
Spectrum
1/3 Octave
Spectrum
Package Information
Digital Volume Control compatible
• 2-pin Digital Volume Control port
• Gain increases when the VC pin is toggled to
ground
• Gain decreases when the VC2 pin is toggled to
ground
• Start-up VC position is programmable
VC2
VC
• Use pushbutton switches or a digital rotary
control like the DCU Scroller
• Analog VC Mode still available
GND
Package Information
Ezairo 5900 IC
25AA256
Amplifier Package
• Stacked-chip design with pad side
designed for flush-mount PCB
reflow.
• RoHS Compliant Assembly
nnnnn
WWYY
0.134" [3.40 mm]
MIC2
DAI
DAT
TC-
TC+
VC
TSW
VC2
applications.
• 256kbit EEPROM
MIC1
M+
M-
VBAT
OA
SDA
CLK
SW
with existing flex in some
RBAT
GND
hybrid configuration, allowing use
OB
• Pad layout matches our current
0.065"
[1.65mm]
0.226" [5.74 mm]
Tocatta Plus flip chip with peripheral bumps
Ethos PCB package with
wirebonded stacked flip chip
Ezairo flip chip with Ball Grid Array
Support Tools
• Windows Device Driver – ETHOS.DLL
 Dynamic Link Library (DLL) supports communications, response modeling, parameter settings,
remote program selection, datalog dump and audio muting.
 Supports HiPro, NoahLink, Microconnect, and eMiniTec programmers
• Engineering Programming Software called “Slider”
 Programs all parameters, estimates frequency response, allows programs to be saved and
recalled
• Transducer Model Measurement Software
 Measures and creates microphone and speaker sensitivity tables
 Tables are used by Slider and DFS software to accurately display frequency response
• Technology White Papers
• Individualized Application Support from our Engineering Staff
Related documents
Download