Highlights 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 Key Features
Hardware Block Diagram Ezairo ™ 5900 Programmable Integrated Audio DSP Ezairo is a trademark of AMI Semiconductor
Highlights 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 Ezairo 5900 Benefits
3 rd Generation AFC 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. Reliant ™ Adaptive Feedback Cancellation
2 nd Generation Noise Reduction 6dB more ASG 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 20’s for longer adapting times.
Adaptation Speed of Ethos versus inTune amplifiers 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 start of hugend of hug Have you hugged your KEMAR today?
Adaptation Speed of Ethos versus inTune amplifiers 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 towards ear phone handset moved away from ear
2 nd Generation 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. 12-channel Layered Noise Reduction™
2 nd Generation Noise Reduction 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. Eight-Channel Wide-Dynamic-Range Compression
2 nd Generation Noise Reduction 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. Adaptive Directionality with Variable Threshold Eliminates the need for a separate directional program User does not have to make a choice Clinical training is simpler 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.
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. Event Data Logging
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. Digital Random Noise Generator
Flat Noise Spectrum High Frequency Spectrum 1/3 Octave Spectrum Examples:
Package Information 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 Digital Volume Control compatible VC2VC GND
Package Information 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 Amplifier Package
Ezairo flip chip with Ball Grid Array Ethos PCB package with wirebonded stacked flip chip Tocatta Plus flip chip with peripheral bumps
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 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 Engineering Programming Software called “Slider” Programs all parameters, estimates frequency response, allows programs to be saved and recalled Technology White Papers Individualized Application Support from our Engineering Staff