Wide range dodecahedron source - Qohm

The highly uniform sound radiation from the Qsources Qohm source allows controlled excitation of the acoustics of small and large sites, such as classical theaters, factory halls, schools, offices, apartments and machinery rooms. It is made for all typical airborne isolation and reverberation testing in large industrial, theater and domestic sites.

Thanks to the unique Qp4 driver technology, this source is low frequency capable (from 50 Hz) and has a the higher sound power output over all third octave bands than any other compact dodecahedron sound source in the market.

This source is extremely light weight, at 3.1 Kg, making on site testing much more efficient. The small Qp4 driver allow for better omni-directionality, far exceeding ISO 16283, providing more accurate measurement data. There are no concerns with remaining background noise as a sufficient level is available from 50 Hz upwards in all third octave bands. There is no need for a separate subwoofer for a building acoustics evaluation. And traveling to a test site, whether by a taxi, by train, or by airplane, with a full equipment set is now feasible

Qohm-Qam sets are in use worldwide, proving their practicality and reliability day by day.

 

Features

Unparalleled work efficiency

Any single person can perform on-site tests

Lightest and smallest full functional dodec. in the market

Compact tripod & soft carry case

High quality and proven reliability

Measurement techniques

Reverberation time

Room impulse responses

Insertion loss

Room transfer

Speech intelligibility

Facade isolation

Any measurement that requires a high sound power level

 

Main characteristics

Diameter +- 265 mm, low frequency capable

Complete source 3.1 kg weight

Sound power 122 dB Lw pink noise

Core frequency range: 100-6300 Hz

Extended frequency range 50-16000 Hz

Broadband high output

High output at 50 Hz: 97 dB Lw

Exceeding the standards ISO 140 / 3382 / 16283

 

Accessibility

Depending on your region the Qohm source is marketed in cooperation with a selected local partner or available directly from Qsources

 
 

Want to see what a fast and easy set-up is?

Want to see how a reverberation measurement with Qam/Qohm is performed?

 

Photo credits: Altia acoustique France – Akron Benelux – Guillaume Bourdin – University of Montpellier – Dr. Monika Rychtarikova – Dr. Voijtech Chmeliken – Dr. Daniel Urban – Faculty of Civil Engineering STU Bratislava