Preconfigured DSP System for Hearing Aids RHYTHM R3920 Description RHYTHM R3920 is a preconfigured hearing health processor based on a DSP platform. Featuring 16 channels of Wide Dynamic www.onsemi.com Range Compression and Impulse Noise Reduction, R3920 encompasses a rich set of advanced sound processing algorithms and is ideal for high end, full-featured hearing aids. The R3920 hybrid is 25 PAD available in one of the industrys smallest form-factors and is HYBRID well-suited for all hearing aid types, including those placed deep in the CASE 127DN ear canal. Features and Benefits Wide Dynamic Range Compression (WDRC) R3920 contains PAD CONNECTION 16 Channels of Wide Dynamic Range Compression, each with individual settings for Squelch Attentuation and Threshold, Low 18 VIN2 17 1 VREG Level Gain, High Level Gain, Upper and Lower Thresholds, and VIN1 Compression Ratio. Independent level detectors for both Squelch and 19 16 2 MGND TIN WDRC are available with customizable attack and release times set in ARD1 each channel. 20 DAI 3 GND Impulse Noise Reduction (INR) Loud, impulsive sounds in the 15 ARD2 environment such as slamming doors, dropped items, or clattering 21 dishes can become uncomfortably or dangerously loud in a traditional PGND VC 14 4 N/C hearing aid. The INR algorithm actively monitors and processes the 22 incoming acoustic signal for such sounds. It ensures that the output OUT+ D VC 13 5 N/C sound preserves the integrity of the speech signal and is descriptive of 23 the environment, while maintaining an optimal comfort level for the SDA OUT 12 6 N/C hearing aid user. Acoustic Environment Classification iSceneDetect analyzes VBP CLK 11 25 24 7 incoming acoustic signals in order to determine the appropriate classification for a given acoustic environment. Six separate VB environments are supported by iSceneDetect: quiet, speech in quiet, 10 9 8 MS1 noise, speech in noise, music, and wind. The feature uses this classification to automatically adjust settings of other features for MS2 optimum audio performance. (Bottom View) iLog 4.0 Datalogging Enables the recording of various hearing aid parameters such as program selection, volume setting and ambient MARKING DIAGRAM sound levels. The sampling interval can be configured to record from every 4 seconds up to once every 60 minutes. The manufacturer can R3920CFAB program the fitting system to retrieve the data for further analysis after XXXXXX an extensive period of wearing the hearing aid. This allows the audiologist to fine tune the hearing aid and further counsel the R3920CFAB = Specific Device Code end-user. XXXXXX = Work Order Number Automatic Adaptive Directionality The Automatic Adaptive Directional Microphone (ADM) algorithm automatically reduces the level of sound sources that originate from behind or to the side of the ORDERING INFORMATION See detailed ordering and shipping information on page 9 of hearing aid wearer without affecting sounds from the front. The this data sheet. algorithm can also gather input from the acoustic iSceneDetect environmental classifier algorithm and automatically select whether directionality is needed or not, translating into additional current savings. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: March, 2021 Rev. 7 R3920/D N/C N/CRHYTHM R3920 Features Adaptive Feedback Canceller Automatically reduces acoustic feedback. It allows for an increase in the stable gain 16 Channel WDRC while minimizing artifacts for music and tonal input signals. Advanced Research Algorithms: Additional tuning parameters make for more precise tuning Impulse Noise Reduction (INR) of the algorithm to the hearing aid. The development tools iSceneDetect Environmental Classification for the R3920 offer a special calibration module to help Automatic Adaptive Directional Microphones (ADM) assess the maximum stable gain in the hearing aid the Directional Processing manufacturer has built to further optimize the Adaptive 128band Adaptive Noise Reduction Feedback Canceller algorithm. NextGeneration Adaptive Feedback Cancellation Adaptive Noise Reduction The Adaptive Noise (AFC) Reduction algorithm monitors noise levels independently in iLog 4.0 Datalogging 128 individual bands and employs advanced psychoacoustic Tinnitus Masking Noise Generator models to reduce noise and provide user comfort. The Evoke Acoustic Indicators algorithm can be set for varying levels of aggressiveness from 3 dB up to 12 dB. Auto Telecoil with Programmable Delay Automatic Receiver Detection For ReceiverinCanal Feedback Path Measurement Tool (RIC) devices with field replaceable receivers, R3920 AGCO with Variable Threshold, Time Constants, and allows manufacturers to code different receiver types so Optional Adaptive Release they are automatically recognizable in software, eliminating 16band Graphic Equalizer potential selection errors. NarrowBand Noise Stimulus Tinnitus Masking R3920 is equipped with a noise 2 SDA or I C Programming source that can be used to mask tinnitus. The noise can be shaped and attenuated and then summed into the audio path 8 Biquadratic Filters either before or after the volume control. A white noise 4 Analog Inputs signal is generated and inserted into the audio path either 16 kHz or 8 kHz Bandwidth before or after the volume control. Filtering can be 6 Fully Configurable Memories with Audible Memory performed on the white noise signal in order to shape the Change Indicator noise signal to a desired frequency and bandwidth. The 96 dB Input Dynamic Range with Headroom Extension tinnitus masker can be used as a stand alone tinnitus making device or as part of a hearing aid. 128bit Fingerprint Security System and Other Security EVOKE Advanced Acoustic Indicators Allows Features to Protect Against Device Cloning and hearing aid manufacturers to provide more pleasing, Software Piracy multifrequency tones simulating musical notes or chords to High Fidelity Audio CODEC indicate events such as program or volume changes. Soft Acoustic Fade between Memory Changes Insitu Tone Generator The narrowband noise Drives ZeroBias 2Terminal Receivers stimulus feature can be used for insitu validation of the Internal or External Digital Volume Control with hearing aid fitting. The frequency, level and duration of the Programmable Range stimuli are individually adjustable. Digital Volume Control Level Retention After Power Other Key Features R3920 also supports the following features: Directional processing, builtin feedback path Cycle measurement, cross fading between audio paths for Rocker Switch Support clickfree program changes, 16band graphic equalizer, 8 Support for Active Hi or Active Lo Switching generic biquad filters (configurable as parametric or other 20bit Audio Processing filter types), programming speed enhancements, optional E1 RoHS Compliant Hybrid peak clipping, flexible compression adjustments, direct These Devices are PbFree and are RoHS Compliant interfaces to analog or digital volume control, rocker switch, direct audio input and telecoil. Rhythm R3920 also Packaging Information encompasses industryleading security features to avoid Hybrid Typical Dimensions: cloning and software piracy. 0.220 x 0.125 x 0.060 in. Support Tools (5.59 x 3.18 x 1.52 mm) Hybrid Jig DSP3 Programming Box ARK Software Support www.onsemi.com 2