Product Overview

L4-IF-N is a 4 channel hearing aid with optional FM developed for hearing aid distributors, medical device importers, audiology clinics, hearing centers and other professional hearing care organizations that require a clearly documented configuration for product evaluation and project purchasing.

The model uses the ACOD2101 intelligent multi-core DSP platform and provides 4 independently adjustable compression and amplification channels, 8 independently adjustable bands and 16 DSP channels. ERAC 1.0 Context Analysis Based Intelligent Multi-Compression Technology uses a Dual-Knee structure.

Feedback management is provided by AFC 2.0 Adaptive Feedback Cancellation with 2 levels together with SIW technology. ENDR 1.0 Environment Detection and Noise Reduction is specified at up to 15 dB.

FM Interface Compatibility and Auto Phone Function are both specified as Optional. This configuration allows B2B buyers to evaluate the core processing platform first and discuss these two project-specific options separately during quotation or model selection.

Flexible Configuration for B2B Projects

For distributors sourcing a 4 channel hearing aid with optional FM, the distinction between included functions and optional items is important for quotation accuracy.

The core configuration includes the 4 / 8 / 16 fitting architecture, ACOD2101 DSP, ERAC 1.0 compression, AFC 2.0 feedback control, SIW technology, ENDR 1.0 noise reduction, one selectable program, internal assessment functions and the documented operating controls.

Two functions can be handled separately according to project requirements:

• FM Interface Compatible — Optional
• Auto Phone Function — Optional

This structure is useful for distributors and importers that need clear specification sheets for different customer programs. It also helps clinics and hearing centers confirm which functions are included in the base configuration and which should be discussed during procurement.

The optional status should remain visible in quotations, technical sheets and product comparison materials so the commercial configuration stays consistent with the product specification.

4 / 8 / 16 Fitting Platform

The fitting structure of L4-IF-N consists of:

• 4 independently adjustable compression and amplification channels
• 8 independently adjustable bands
• 16 DSP channels
• ACOD2101 intelligent multi-core DSP
• ERAC 1.0 Multi-Compression Technology with a Dual-Knee structure

For professional fitting teams, this architecture provides defined adjustment points for configuration and evaluation. For distributors, the 4 / 8 / 16 structure creates a concise technical identity that can be used in catalog tables, sample reviews and quotation documents.

Buyers comparing a 4 channel hearing aid with optional FM can therefore assess the fitting architecture independently from the two optional functions. This keeps the technical comparison focused on measurable specifications rather than broad product claims.

AFC 2.0 Feedback Control and ENDR 1.0

L4-IF-N uses AFC 2.0 Adaptive Feedback Cancellation with 2 levels. SIW technology is included as part of the processing configuration.

Noise reduction is provided by ENDR 1.0, specified at up to 15 dB. The compression framework is based on ERAC 1.0 Context Analysis Based Intelligent Multi-Compression Technology with a Dual-Knee structure.

For distributors and professional hearing care organizations, these processing specifications provide a clear basis for sample evaluation and technical comparison. They also remain separate from the FM Interface and Auto Phone options, allowing procurement teams to review the core processing specifications and project configuration as two distinct parts of the product specification.

Electroacoustic Reference Data

Maximum OSPL90 is 110 dB and HFA OSPL90 is 105 dB. Maximum FOG50 is 35 dB and HFA FOG50 is 29 dB. RTG Target and RTG Measured are both specified at 29 dB.

The frequency range is 200–5000 Hz, battery current is 1.2 mA and EQ is 25 dB. THD at 500 Hz, 800 Hz and 1600 Hz is specified at 3%.

These values provide distributors and importers with a consistent reference for procurement documentation, sample comparison and technical review.

For buyers evaluating a 4 channel hearing aid with optional FM, the electroacoustic data can be reviewed together with the 4 / 8 / 16 fitting structure and the documented processing platform. This supports a specification-based purchasing decision without relying on unverified application or performance claims.

Professional Operating Functions

L4-IF-N provides 1 selectable program and includes an Internal Sound Field Assessment System and Internal Audiometer System.

Additional included functions are:

• Adjustable Turn-on Delay
• Occlusion Effect Management
• Low Battery Power Notification
• Adjustable Notification Volume
• Volume Control
• Memory After Power-off
• Standard Personalized Data Storage
• Nano Coating Technology

FM Interface Compatibility and Auto Phone Function remain Optional.

This operating configuration gives clinics and hearing centers a defined set of professional functions for assessment and fitting, while distributors can manage the optional items separately when preparing quotations or project specifications.

B2B Procurement Positioning

L4-IF-N is suitable for distributors, importers, audiology clinics and hearing centers that need a compact specification set with clear project configuration options.

For procurement comparison, key specifications include 4 fitting channels, 8 adjustable bands, 16 DSP channels, AFC 2.0 with 2 levels, ENDR 1.0 up to 15 dB, one selectable program and Standard Personalized Data Storage.

For a 4 channel hearing aid with optional FM, the main commercial distinction is that FM Interface Compatibility and Auto Phone Function can be selected as project options rather than treated as included features.

This makes L4-IF-N straightforward to present in B2B quotations, sample programs and technical comparison documents where included functions and project-specific options need to be clearly separated.

Technical Specifications

FAQ

How many fitting channels does L4-IF-N provide?

L4-IF-N provides 4 independently adjustable compression and amplification channels, 8 independently adjustable bands and 16 DSP channels.

Is FM Interface Compatibility included as standard?

No. FM Interface Compatibility is specified as Optional.

Is Auto Phone Function included as standard?

No. Auto Phone Function is specified as Optional.

Which feedback and noise-reduction technologies are included?

The model uses AFC 2.0 Adaptive Feedback Cancellation with 2 levels and ENDR 1.0 up to 15 dB.

How many selectable programs are provided?

L4-IF-N provides 1 selectable program.

Contact AcoSound

Looking for a 4 channel hearing aid with optional FM for a professional product portfolio? Contact AcoSound for L4-IF-N specifications, sample information, quotation support and project configuration details.