Cello is a PC or iPad® controlled diagnostic audiometer, capable of performing fast and accurate air, bone and speech audiometry exams, as well as several additional tests including QuickSIN™, HF audiometry, and video-VRA. With its revolutionary design, complete feature set and top reliability, Cello is a little masterpiece, ideal for anyone unwilling to compromise on appearance and user experience.

iPad® control

The Aero option lets you control Cello directly from your iPad® over a Bluetooth connection. The Maestro app, available on the Apple® App Store®, can be used for pure tone and speech audiometry; it features a complete patient database, while also allowing you to print professional reports and export data to Noah and Daisy.

Computer control

Connect Cello to the USB port of your Windows® computer and you are ready to go: no driver and no additional cable required. You can control Cello through the Maestro module’s amazingly user-friendly interface, available for Daisy and Noah.


Besides the standard audiometry exams, Cello also performs Hughson-Westlake automated audiometry, high-frequency pure tone exam, speech audiometry, QuickSIN® and SISI, and includes a 2 channel Master Hearing Aid.


With Cello, in few minutes you can build a video-VRA system with unlimited possibilities for customizing the images and videos used as reinforces. Everything is controlled through the Maestro module, simply connect up to three displays to your computer to provide the reinforces.

Hang it on the wall!

Decorate your sound booth with Cello! Available with different changeable colorful and stunning magnetic covers, you can easily hang Cello on the wall using the featured VESA mount or the specially designed transducer holder.

Download Technical Sheet
IntensityAC: -10 to 120 dB HL. BC: -10 to 80 dB HL
AC HF-20 to 90 dB HL
Frequency range125-8000 Hz
8 – 20 kHz (with HDA-300 headphones)
InputTone, warble tone, EXT1 and EXT2, USB audio, mic
MaskingNBN, WN, SN
OutputAC L+R, Insert L+R, BC, FF L+R, insert masking, HF L+R
Talk overexternal microphone or computer
Monitorext. earphone / speaker or computer
Test batteryPTA (HL and UCL), Speech Audiometry (WRS, SRT, MCL, and UCL), Autothreshold, SISI, Master Hearing Aid, QuickSIN® (opt.), High Frequency (opt.), video-VRA (opt.)
Connection to PCUSB
Compatible SWDaisy or Noah with Maestro module (both included)
Conn. to iPad®Bluetooth 4 (requires Aero option)
Controlling appMaestro
Dimensions30,8 x 21,7 x 6,4 cm / 12.1 x 8.5 x 2.5 in. (LxWxH)
Weight1.3 Kg / 2.9 lbs
StandardsAudiometer: EN 60645 -1 / ANSI S3.6, Type 2
SpeechEN60645-2 / ANSI S3.6 type A-E
HFEN60645-4/ANSI S3.6
SafetyEN 60601-1
EMCEN 60601-1-2
ClassificationClass IIa (MDD 93/42)
Inventis Cello audiometer - Introduction

Inventis Cello audiometer - Introduction

Inventis Cello - Pure tone and Speech audiometry

Inventis Cello - Pure tone and Speech audiometry

Inventis Cello - Visual Reinforcement Audiometry & QuickSIN test

Inventis Cello - Visual Reinforcement Audiometry & QuickSIN test

Inventis Cello - Installation

Inventis Cello - Installation