Dr. Ir Pieter Schevenels, PS-Acoustics BVBA , Zonhoven Belgium, www.ps-acoustics.be.
We use the Qohm omni-directional sound source together with the Qam amplifier for all our building acoustics measurement for our acoustical consulting office, including measurements of airborne sound insulation (ISO 140-4), façade sound insulation (ISO 140-5) reverberation (ISO 3382-2 and as correction for insulation measurements in the ISO 140 series) and acoustical parameters in landscape offices according to ISO 3382-3. The light weight makes it comfortable to change positions within a room and to travel from room to room, which consumes often a large time of a measurement campaign, since the measurements themselves only take a couple of minutes. The maximum power is overwhelmingly loud and sufficient for measurement of very well insulated partitions.
Mr. Michel Karroum, TOEC Ltd Turin Italy, www.toec.it
“We have been using the small Qsources source to perform testing at various larger and smaller sites for building qualification tests. The source and amplifier have shown to be reliable and I use them at my mayor client sites like Generali assicurazioni, UBI Leasing, Unicredit, etc.
Now, it is difficult to imagine going back to using my other heavy sound source again. In using the Qsources set we have gained both in efficiency and flexibility”
Prof. Wieslav Woszczyk, McGill Recording Studios, Schulich school of Music:
“To explain how excellent these dodec speakers are. We measure large recording and performace site acoustics, and the Qsources dodec speakers are sufficiently powerful to fill with sound energy, even at some of the largest rooms we have measured. Their output is also well balanced across frequencies so it makes it easier to see all the needed parameters. Great job designing these little monsters. The enclosed photo is from recent measurements made at a relatively short distance (as it shows better on the picture).”
Prof. Dr. Gerrit Vermeir, Catholic University Leuven Belgium
“The Qsources set has been used for room-acoustic measurements and isolation measurements in our laboratory. The experiences have been very positive; small size, easy handling weight, high sound power, high stability of the power during prolonged use, maximum achievable omni-directionality,… Additional advantages were the step-wise fixed levels on the amplifier unit. And, due to the compactness of the source we could use a good microphone stand instead of the large and heavy tripod we previously had to use with dodecahedron sources.”