The L4-IF-N hearing aid is a digital hearing solution built around AcoSound’s ACOD2101 Intelligent Multi-Core DSP platform. Its processing architecture combines 4 independent adjustable compression and amplification channels, 8 independently adjustable bands and 16 DSP processing channels. This configuration gives fitting professionals multiple adjustment points for tailoring amplification and frequency response.
As a 4-channel digital hearing aid, the L4-IF-N integrates ERAC 1.0 Context-Analysis-Based Intelligent Multi-Compression Technology with a Dual-Knee structure. It also features AFC 2.0 adaptive feedback cancellation, ENDR 1.0 environmental detection and noise reduction, and SIW technology. Additional functions include an internal sound field assessment system, an internal audiometer system and occlusion effect management.
For hearing aid distributors, importers and hearing-care businesses, the L4-IF-N hearing aid offers a configurable digital platform with adjustable processing, fitting-related functions and optional accessories. Its specifications give B2B partners a clear basis for evaluating the model against their market and product portfolio requirements.
Key Features
ACOD2101 Intelligent Multi-Core DSP
At the core of the L4-IF-N hearing aid is the ACOD2101 DSP platform. It provides 16 DSP processing channels and supports the device’s multi-channel sound processing architecture.
4 Independent Compression and Amplification Channels
The device provides 4 independently adjustable compression and amplification channels. This allows fitting professionals to adjust channel behaviour according to individual fitting requirements.
8 Independently Adjustable Bands
With 8 independent adjustable bands, this 4-channel digital hearing aid supports frequency-specific adjustments. This provides additional flexibility when configuring amplification across the specified frequency range.
ERAC 1.0 Dual-Knee Compression
ERAC 1.0 Context-Analysis-Based Intelligent Multi-Compression Technology uses a Dual-Knee compression structure. It is designed to support compression management across different input levels as part of the product’s digital processing configuration.
AFC 2.0 Feedback Cancellation
AFC 2.0 adaptive feedback cancellation provides two adjustment levels. The function is designed to help manage unwanted acoustic feedback during device use.
ENDR 1.0 Environmental Detection and Noise Reduction
The ENDR 1.0 noise reduction system combines environmental detection and noise reduction. The supplied specification lists a maximum noise reduction value of 15 dB. Actual performance should be interpreted according to the manufacturer’s test conditions and approved technical documentation.
SIW and Nano Coating Technology
The L4-IF-N hearing aid also includes SIW technology and nano coating technology as part of its product configuration.
Fitting and User-Adjustment Functions
The L4-IF-N hearing aid includes several fitting-related and user-adjustment functions intended to support setup and daily operation.
Internal Sound Field Assessment System: Integrated sound field assessment functionality.
Internal Audiometer System: An audiometer system built into the device configuration.
Occlusion Effect Management: A function intended to support management of the occlusion effect during fitting.
Adjustable Turn-On Delay: Allows the turn-on delay to be adjusted.
Volume Control: Supports volume adjustment.
Adjustable Notification Volume: Notification volume can be adjusted.
Low-Battery Notification: Provides a notification when battery power is low.
Memory After Power-Off: Retains supported settings after the device is powered off.
Personalized Data Storage: Standard personalized data storage is included.
Selectable Programs: The specification lists one selectable program.
These functions provide fitting professionals with several configuration options. The exact fitting workflow and supported adjustments should be confirmed against the applicable product documentation.
Optional Functions and Accessories
The L4-IF-N supports optional configurations for selected project requirements.
These options should be confirmed with AcoSound before quotation or order placement, as availability may depend on the selected configuration. This helps buyers evaluate the L4-IF-N hearing aid against project-specific requirements without assuming optional functions are standard.
Technical Specifications
| Specification |
L4-IF-N |
| Model |
L4-IF-N |
| OSPL90 Maximum |
110 dB |
| OSPL90 HFA |
105 dB |
| FOG50 Maximum |
35 dB |
| FOG50 HFA |
29 dB |
| THD at 500 Hz |
0.03 |
| THD at 800 Hz |
0.03 |
| THD at 1600 Hz |
0.03 |
| RTG Target |
29 |
| RTG Measured |
29 |
| EQ |
25 dB |
| Battery Current |
1.2 mA |
| Frequency Range |
200–5000 Hz |
| Processing Channels |
4 |
| Independent Adjustable Compression and Amplification Channels |
4 |
| Independent Adjustable Bands |
8 |
| DSP Chip |
ACOD2101 |
| DSP Processing Channels |
16 |
| Compression Technology |
ERAC 1.0, Dual-Knee |
| Feedback Cancellation |
AFC 2.0, 2 Levels |
| Environmental Detection and Noise Reduction |
ENDR 1.0, Maximum 15 dB |
| SIW Technology |
Supported |
| Selectable Programs |
1 |
| Internal Sound Field Assessment System |
Supported |
| Internal Audiometer System |
Supported |
| Adjustable Turn-On Delay |
Supported |
| Occlusion Effect Management |
Supported |
| Low-Battery Notification |
Supported |
| Adjustable Notification Volume |
Supported |
| Volume Control |
Supported |
| FM Interface |
Optional |
| Auto Phone Function |
Optional |
| Memory After Power-Off |
Supported |
| Personalized Data Storage |
Standard |
| Nano Coating Technology |
Supported |
A Digital Hearing Aid Platform for B2B Partners
For distributors and hearing-care businesses, product evaluation involves more than a short feature list. Buyers need to understand the processing architecture, available adjustment functions, optional configurations and technical specifications before selecting a model for their market.
The L4-IF-N hearing aid brings together ACOD2101 DSP technology, 4 adjustable compression and amplification channels, 8 adjustable bands, ERAC 1.0 compression, AFC 2.0 feedback cancellation and ENDR 1.0 noise reduction. This combination gives B2B partners a clear set of technical features to review when comparing digital hearing aid platforms.
For a distributor building a digital product portfolio, the L4-IF-N hearing aid provides a defined set of documented functions to review with technical teams. AcoSound works with distributors, importers, hearing-care organizations and hearing aid brands. Partners can discuss product specifications, optional configurations, technical documentation and OEM/ODM cooperation with the AcoSound team.
Frequently Asked Questions
How many adjustable channels does the L4-IF-N have?
The specification lists 4 independent adjustable compression and amplification channels, together with 8 independently adjustable bands and 16 DSP processing channels.
Which DSP chip is used in the L4-IF-N?
The device uses AcoSound’s ACOD2101 Intelligent Multi-Core DSP platform.
Does the L4-IF-N support feedback cancellation?
Yes. It includes AFC 2.0 feedback cancellation with two adjustment levels.
What noise reduction system does the product use?
The L4-IF-N uses ENDR 1.0 environmental detection and noise reduction, with a maximum value of 15 dB listed in the supplied specification.
Are FM and Auto Phone functions standard?
No. Both FM interface compatibility and the Auto Phone function are listed as optional configurations. Confirm availability for the required order configuration.
Discuss the L4-IF-N with AcoSound
If you are evaluating the L4-IF-N hearing aid for your product range, contact AcoSound to request technical documentation, confirm optional configurations and discuss your market requirements.
AcoSound supports B2B cooperation with distributors, importers and hearing aid brands, including OEM/ODM and private-label projects. Share your target market and product requirements with our team to start a product discussion.
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