Advance acoustic Terra 128B Specifications download pdf

January, 2015 − Rev. 1

1 Publication Order Number:

SA3286/D

INSPIRIA SA3286

Pre-configured DSP System

for Hearing Aids

INSPIRIA SA3286 features iSceneDetectt environmental

classification, 128−bands of noise reduction, superior feedback

cancellation and built−in feedback path measurement capabilities. The

VOYAGEURt based hybrid sets a new standard of performance.

The iSceneDetect Environment Classification algorithm automatically

senses the hearing aid wearer’s environment and dynamically adjusts

hearing enhancement algorithms (such as Feedback cancellation, noise

reduction, compression, etc.) without user involvement.

Environment classification on Inspiria SA3286 enables programming

of hearing aid to a single program setting which can be employed by the

hearing−aid wearer in all environments instead of manually changing to

a different memory with a change in the acoustic environment.

The Inspiria SA3286 comes with EVOKEt advanced acoustic

indicators. EVOKE allows manufacturers to provide more complex,

multi−frequency tones which can simulate musical notes or chords.

The Inspiria SA3286 iLogt 2.0 Datalogging feature records various

parameters every 4 seconds to 60 minutes (programmable) during use of

the device. Once these parameter values are read from the device, they

can be used to counsel the hearing aid wearer and fine tune the fitting.

The Inspiria SA3286’s Adaptive Noise Reduction monitors noise

levels independently in 128 individual bands and employs advanced

psychoacoustic models to provide user comfort.

Based on a phase cancellation method, Inspiria SA3286’s adaptive

feedback reduction algorithm provides an increase in added stable

gain. It features rapid adjustment for dynamic feedback situations and

resistance to tonal inputs.

Automatic Adaptive Directional Microphone (ADM) algorithm

from ON Semiconductor automatically reduces the level of sound

sources that originate from behind or the side of the hearing−aid

wearer without affecting sounds from the front by adjusting the null in

the microphone polar pattern to minimize the noise level at the output

of the ADM. To reduce current consumption, the algorithm can switch

automatically between 1 mic omni and ADM depending on the

acoustic environment.

The Inspiria SA3286 is equipped with a noise source that can be

used in treating tinnitus. The Tinnitus Treatment noise can be shaped

and attenuated and then summed into the audio path either before or

after the volume control.

The Narrow−band Noise Stimulus feature allows the user to generate

stimuli from the device that can be used for in situ audiometry.

In addition to these adaptive algorithms, the Inspiria SA3286 also

supports the following features: up to 8 channel WDRC,

FRONTWAVE

directional processing, cross fading between audio

paths for click−free memory changes, 16−band graphic equalizer, 8

generic biquad filters (configurable as parametric or other filter types),

programming speed enhancements, optional peak clipping, flexible

compression adjustments, volume control, rocker switch, and

industry−leading security features to avoid cloning and software piracy.

www.onsemi.com

16 PAD

HYBRID

CASE TBD

VREG

TIN

DAI

MS2

VBP

OUT−OUT+

MGND

PAD CONNECTION

FMIC

RMIC

SDA

GND

PGND

MARKING DIAGRAM

SA3286−E1

XXXXXX

SA3286 = Specific Device Code

E1 = RoHS Compliant Hybrid

XXXXXX = Work Order Number

(Bottom View)

See detailed ordering and shipping information on page 14 of

this data sheet.

ORDERING INFORMATION

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - Pre-configured DSP System

Page 2 - Features

INSPIRIA SA3286www.onsemi.com10HRX Head Room ExpanderThe Inspiria SA3286 has an enhanced Head RoomExpander (HRX) circuit that increases the input dyna

Page 3

INSPIRIA SA3286www.onsemi.com11Biquad FiltersAdditional frequency shaping can be achieved byconfiguring generic biquad filters. The transfer function

Page 4

INSPIRIA SA3286www.onsemi.com12Memory Select SwitchesOne or two, two−pole Memory Select (MS) switches canbe used with the Inspiria SA3286. This enable

Page 5

INSPIRIA SA3286www.onsemi.com13In this mode, it is possible to jump from any memory toany other memory simply by changing the state of bothswitches. I

Page 6

INSPIRIA SA3286www.onsemi.com14output reduction are applied) while monitoring thesupply voltage. If the supply voltage remains above theturn−ON thresh

Page 7 - Adaptive Feedback Canceller

INSPIRIA SA3286www.onsemi.com15Table 6. PAD POSITION AND DIMENSIONSPad No.Pad Position Pad DimensionsX Y Xdim (mil) Ydim (mil)1 0 0 18 382 29 5.75 20

Page 8 - • Masking threshold

INSPIRIA SA3286www.onsemi.com16PACKAGE DIMENSIONS0.026(0.660)0.016(0.406)0.215(5.46)0.072 MAX(1.83)0.124(3.15)Dimension units are in inches.Dimensions

Page 9

INSPIRIA SA3286www.onsemi.com2Features• Advanced Research♦ 128−band Adaptive Noise Reduction♦ Adaptive Feedback Cancellation♦ Feedback Path Measuremen

Page 10

INSPIRIA SA3286www.onsemi.com3Table 1. ABSOLUTE MAXIMUM RATINGSParameter Value UnitsOperating Temperature Range 0 to +40 °CStorage Temperature Range −

Page 11

INSPIRIA SA3286www.onsemi.com4Table 2. ELECTRICAL CHARACTERISTICS (VBAT = 1.25 V; Temperature = 25°C) (Note 2)Parameter UnitsMaxTypMinConditionsSymbol

Page 12

INSPIRIA SA3286www.onsemi.com5TYPICAL APPLICATIONSFigure 2. Test Circuit3k93k91 k1 k200 kLPOUT163214151121367891011ProgrammingInterfaceEEPROMControlA/

Page 13

INSPIRIA SA3286www.onsemi.com6Figure 4. Typical Hearing Instrument Assembly DiagramT−coilVC++CS44+ −MSswitch(N.O.)Zero BiasedReceiverFrontMicRearMicIN

Page 14

INSPIRIA SA3286www.onsemi.com7In the Telecoil mode gains are trimmed during Cal/Configprocess to compensate for microphone/telecoil mismatches.The Fro

Page 15

INSPIRIA SA3286www.onsemi.com8Figure 5. Adaptive Feedback Canceller (AFC)Block DiagramGΣH’H+−Feedback pathEstimated feedbackFeedback Path Measurement

Page 16 - SA3286 − E1

INSPIRIA SA3286www.onsemi.com9reduce current consumption. While in this omni−directionalstate, the algorithm will periodically check for conditionswar