Highlights

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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

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Hardware Block Diagram
Ezairo 5900 Programmable Integrated Audio DSP
Ezairo is a trademark of AMI Semiconductor
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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

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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.

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2nd Generation Noise Reduction

• What this graph means
• It shows the adapting time to changing reflective
  surface for a given amount of added stable gain.
• It shows that Ethos can achieve more ASG for a
  given adapting time.
• At 1 second adapting time, Ethos allows 6 dB more
  added stable gain.
• Ethos can achieve ASG levels into the low-to-mid
  20s for longer adapting times.

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Adaptation Speed of Ethos versus inTune amplifiers
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• 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

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Adaptation Speed of Ethos versus inTune amplifiers
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• 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

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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.

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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.

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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

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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.

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Examples
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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.

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Examples
Flat Noise Spectrum
High Frequency Spectrum
1/3 Octave Spectrum
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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
• Use pushbutton switches or a digital rotary
  control like the DCU Scroller
• Analog VC Mode still available

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Package Information
Amplifier Package

• Stacked-chip design with pad side designed for
  flush-mount PCB reflow.
• Pad layout matches our current hybrid
  configuration, allowing use with existing flex in
  some applications.
• RoHS Compliant Assembly
• 256kbit EEPROM

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Tocatta Plus flip chip with peripheral bumps
Ethos PCB package with wirebonded stacked flip
chip
Ezairo flip chip with Ball Grid Array
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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