Bell is a screening/diagnostic audiometer, capable of performing fast and accurate air and bone threshold examinations.
Simple operation, a user-friendly interface and easy portability make Bell the ideal instrument for private clinics, multi-specialist clinics and occupational medicine applications.
Bell is available in two configurations to suit different user needs: Basic and Plus.

“Basic” model: The screener

The Basic model features manual and automatic air conduction threshold examinations at frequencies from 125 Hz up to 8 kHz with masking.

“Plus” model: The basic diagnostics

The Plus model can perform bone conduction audiometric examinations in addition to air conduction exams.

The display

The key feature of the Bell audiometer is its large, bright graphic color display, on which you can view the complete audiogram during the examination.

Portable system

Bell is the ideal choice of audiometer for users who need a portable instrument. Despite its practical keyboard and generous display, Bell is extremely compact and lightweight and easy to carry in its dedicated case.

Noah & Maestro integration

Simply connect Bell to a USB port on your computer (no driver needed), and you can transfer exam results into Maestro or Noah database. With the live view feature, you can have a wide view of the examination in progress on the computer display.

Hybrid Technology

Bell features Inventis Hy-Tech: you can decide whether to operate it in the traditional way (stand-alone mode) or control it through the computer.


Intensity AC: -10 to 120 dB HL.
BC: -10 to 80 dB HL
Frequency range 125-8000 Hz (12.5 kHz available with HDA-280 headsets)
Input Tone, warble tone
Masking WN (Plus), NBN
Output AC L+R, BC (Plus), insert masking
Talk over built-in or external microphone
Display color display, 95 x 54 mm, 480 x 272 pixels
Test battery Pure tone audiometry,
HW Autothreshold
Data storage internal memory for 100 patients
PC interface bidirectional USB
Modes of operation Stand-alone and Hybrid
Compatible SW Inventis Maestro or Noah with dedicated module
Dimensions 32 x 32 x 9 cm / 12.6 x 12.6 x 3.5 in (LxWxH)
Weight 1.8 Kg / 4.0 lbs
Standards Basic: EN 60645 -1 / ANSI S3.6, Type 4
Plus: EN 60645 -1 / ANSI S3.6, Type 3
Safety: EN 60601-1
EMC: EN 60601-1-2
Classification Class IIa (MDD 93/42)