© Semiconductor Components Industries, LLC, 2015

September, 2016 − Rev. 5

1

Publication Order Number:

R3920/D

RHYTHM R3920

Preconfigured DSP System

for Hearing Aids

Description

RHYTHM

t 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 − iSceneDetect

t 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.

iLog

t 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

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

MARKING DIAGRAM

R3920−CFAB

XXXXXX

R3920−CFAB = Specific Device Code

XXXXXX

= Work Order Number

(Bottom View)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

VIN1

19

ARD1

20

ARD2

21

N/C

22

N/C

23

N/C

25

24

VIN2

TIN

DAI

VC

D_VC

SDA

CLK

MS1

VREG

MGND

GND

PGND

OUT+

OUT−

VBP

VB

MS2

See detailed ordering and shipping information on page 9 of

this data sheet.

ORDERING INFORMATION