R3920 Datasheet, PDF (1/13 Pages) ON Semiconductor – Preconfigured DSP System

RHYTHM R3920
Preconfigured DSP System
for Hearing Aids
Description
RHYTHMt R3920 is a preconfigured hearing health processor
based on a DSP platform. Featuring 16 channels of Wide Dynamic
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
available in one of the industry’s smallest form-factors and is
well-suited for all hearing aid types, including those placed deep in the
ear canal.
Features and Benefits
Wide Dynamic Range Compression (WDRC) − R3920 contains
16 Channels of Wide Dynamic Range Compression, each with
individual settings for Squelch Attentuation and Threshold, Low
Level Gain, High Level Gain, Upper and Lower Thresholds, and
Compression Ratio. Independent level detectors for both Squelch and
WDRC are available with customizable attack and release times set in
each channel.
Impulse Noise Reduction (INR) – Loud, impulsive sounds in the
environment such as slamming doors, dropped items, or clattering
dishes can become uncomfortably or dangerously loud in a traditional
hearing aid. The INR algorithm actively monitors and processes the
incoming acoustic signal for such sounds. It ensures that the output
sound preserves the integrity of the speech signal and is descriptive of
the environment, while maintaining an optimal comfort level for the
hearing aid user.
Acoustic Environment Classification − iSceneDetectt analyzes
incoming acoustic signals in order to determine the appropriate
classification for a given acoustic environment. Six separate
environments are supported by iSceneDetect: quiet, speech in quiet,
noise, speech in noise, music, and wind. The feature uses this
classification to automatically adjust settings of other features for
optimum audio performance.
iLogt 4.0 Datalogging − Enables the recording of various hearing
aid parameters such as program selection, volume setting and ambient
sound levels. The sampling interval can be configured to record from
every 4 seconds up to once every 60 minutes. The manufacturer can
program the fitting system to retrieve the data for further analysis after
an extensive period of wearing the hearing aid. This allows the
audiologist to fine tune the hearing aid and further counsel the
end-user.
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
hearing aid wearer without affecting sounds from the front. The
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.
www.onsemi.com
25 PAD
HYBRID
CASE 127DN
PAD CONNECTION
VIN2 17
TIN 16
DAI 15
VC 14
D_VC 13
SDA ₁₂
CLK 11
18
VIN1
19
ARD1
20
ARD2
21
N/C
22
N/C
23
N/C
25 24
1
VREG
2
MGND
3 GND
4 ^PGND
5 ^OUT+
6 ^OUT−
7 ^VBP
MS1 10
9
8
VB
MS2
(Bottom View)
MARKING DIAGRAM
R3920−CFAB
XXXXXX
R3920−CFAB = Specific Device Code
XXXXXX
= Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 9 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
August, 2015 − Rev. 4
Publication Order Number:
R3920/D