Inventis Drum high attenuation of ambient sounds
Inventis Drum RECD functionality
Inventis Drum with automatic protocols


Drum is a hearing instrument test box (HIT) capable of an impressive ambient sounds attenuation, and featured with all the standard tests for evaluating performances of air conduction hearing aids. Directly controllable from the Maestro software, Noah compatible and equipped with coupler and all adapters for any type of hearing aids, Drum is the perfect solution for those most demanding users who are not willing to compromise on user friendliness of their instrument.


Both IEC 60118-7 and ANSI S3.22 standard sequences for Hearing Instrument testing are available on Drum. Automatic protocols with selectable tests, and tooltips for user actions required are specially developed for simplifying the testing procedure.


Size and shape of Drum are engineered to maximize the attenuation of ambient noise and minimize the internal sound reflection. Made of wood, featuring an egg-shaped internal chamber and, thanks to the sound-transparent foam at the bottom, offering a floating positioning of the hearing aid exactly in front of the speaker, Drum is the perfect test box for getting the highest quality test results.


Connect Drum to the USB port of your Windows® computer, the electrical grid, and you are ready to go: no drivers and no additional cables required.
You can control Drum through the amazingly user-friendly Maestro software interface and, if need be, transfer the data directly to Noah.

Inventis Drum high quality test results
High attenuation of ambient sounds
Engineered to maximize the attenuation of ambient noise and minimize the internal sound reflection.
Simplified procedures
Automatic protocols
Automated protocols with selectable tests are specially developed to simplify the testing procedure.
RECD functionality
It can be used as a RECD if combined with Trumpet.

Available measurement modalities
  • Single-curve or multi-curves
  • Standard or custom measurements
Available tests OSPL90, Full On Gain (FOG), I/O, Attack/Release, Frequency Response, Equivalent Input Noise, THD, Battery Drain, Telecoil, Frequency Measurement (sweep or broadband)
Available outputs Loudspeaker or Telecoil
Available stimuli Pure tone, sweep or broadband stimuli
HIT: frequency, intensity and measurement
  • Frequency range: 125 Hz – 10 kHz (HIT), 125 Hz – 12 kHz (RECD with REM module)
  • Frequency resolution: 1/3, 1/6, 1/12, 1/24 per octave
  • Intensity range: 40 – 100 dB SPL
  • Coupler intensity range: 40 – 145 dB
  • Reference microphone measurement: Omni-Directional
  • Telecoil stimulation range: 10-100 mA/m
Internal chamber
  • Egg-shaped (Minimum sound reflection)
  • Internal dimensions: 15x25x13cm
  • H.A. position: Floating, on acoustically-transparent material, in
  • front of the loudspeaker
  • Loudspeaker features: 3”, full range
Available couplers 2cc coupler for hearing aids with ITE, RIC and BTE adapters
Battery simulators Standard 10A, 13, 312, 675
Monitoring Operator interface for coupler monitoring
Calibration Validity: 12 months
Computer interface
  • USB connection (driverless)
  • Compatible software: Inventis Maestro (Noah compatible)
Minimum system requirements Refer to Maestro software technical specifications for indications about the minimum system requirements
Power supply Power supply: 15V, 2A cont., through an external medical grade 100-240 Vac 50/60 Hz power supply
  • Size (WxDxH): 31.5 x 32.5 x 22 cm / 12.4 x12.8 x 8.7 in
  • Weight: 7.5 kg / 16.5 lbs

Inventis S.r.l. a socio unico
Corso Stati Uniti, 1/3
35127 Padova

Tel.: +39.049.8962.844

North America

Inventis North America Inc.
2503 S Washington Ave #586
Titusville FL, 32780

Toll free: +1.844.683.6847


Synapsys sas
2 rue Marc Donadille
Hôtel Technoptic
13013 Marseille

tél.: +