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Qsources LightWeightShaker – gamechanger at the University of Technology Sydney

Qsources LightWeightShaker – gamechanger at the University of Technology Sydney Dr. Ben Halkon – Associate Professor at the Faculty of Engineering and Information Technology at the University of Technology Sydney (UTS) shared with Qsources his feedback following the acquisition of Qsources Qlws – LightWeight Shaker. Dr. Ben Halkon stated: “The Qlws LightWeight Shaker we have has genuinely been a game-changer for us – thank you Qsources ! It has worked especially well with the Scanning Laser Doppler Vibrometer which is highly complementary hardware for lightweight structures. I have never before seen such a strong COH function across such a wide frequency range as that which we achieved with these two devices in combination! The mode shapes that we were able to process were similarly some of the most normal looking modes I have ever seen from EMA and, combined with the fine spatial resolution available, were more akin to those you would expect to get from FEA! Incredible” Dr. Halkon further added: “I wanted to prepare a video series to help our relatively inexperienced, transient users understand what is in the box and what to do with the Qlws and how to use it properly.”
Peter van der Linden – managing director of Qsources – commented: ” Most of the time we do not see what our customers do with our excitation equipment. It is great to see such an experience by Dr. Ben Halkon with the Qlws shaker at the UTS.”

Interested to have a look at the videos ? Please check part 1 and part 2. A third video is on its way !

#lightweight #shaker #universityofsydney #modalanalysis #finiteelementanalysis

Qsources monopole sound source to improve sports performance

SonIQ is an acoustic consultancy company specialized in building and room acoustics based in Belgium. Through Qsources’ distributor Akron SonIQ initially purchased the Qtap – lightweight tapping machine which then was followed by a trial of our Qoms2 – monopole sound source. SonIQ really liked our lightweight solution and decided to acquire the source directly following on from the positive user experience during the trial !

The source was immediately put at use in the acoustic optimization of a series of sports halls throughout Flanders. Bart Van de Velde, owner of SonIQ, explains: ‘The measurement sessions had two main objectives. Firstly the reverberation time T30 in most sports halls is higher than the allowable norm whilst the users do not always experience this as a problem. Additionally the reverb time as measured is higher than the calculated value as a result of a flutter echo and the avoidance of this echo is difficult to predict.” Bart further detailed SonIQ’s choice for the Qoms2 in doing these measurement: ” The Qoms2 offers a very high combined sound power level combined with extreme light weight whilst the point source characteristics are a great advantage definitely in the analysis of reflections. The overall set is complete (including the high quality tripod and transport bag) which provides for easy handling of the equipment”. Bart concluded by stating: “We look forward to doing additional measurements with the Qoms2, formulating our recommendations and, hopefully, improving Flemish sports performance ! Find out more on how our Qoms2 can improve your performance ?
https://lnkd.in/ehYMj7FM
Find out more on SonIQ acoustic consultancy services ? https://son-iq.be

Marubun to showcase Infra-Qsources products at inter-noise 2023

Marubun, our Infra-Qsources partner for Japan, will be participating at the inter-noise 2023 exhibition. inter-noise 2023 will be held in Chiba, Greater Tokyo during 20-23 August under the theme of “Quieter Society with Diversity & Inclusion”.

You can find Marubun at booth 2 where Naoki Sugawara and his colleagues will be more than happy to present you with our range of omni-directional sound sources and amplifiers for your building and room acoustics applications.

#acoustics #quiet #internoise #diversity #inclusion #soundsources

University of Zagreb

The Faculty of Mechanical Engineering and Naval Architecture (FAMENA) is the oldest and the largest faculty in the field of mechanical engineering in Croatia with almost century-old tradition. It is the successor to the Royal Technical College founded in 1919. FAMENA has been one of the Croatian leading institutions in education, science and expertise in the fields of mechanical engineering and naval architecture.

DAGA 2023 participation

Another two weeks before Acoustics DAGA 2023 in Hamburg from 6 to 9 March 2023 where we will be showcasing our Infra-Qsources product range. Look out for our Qohm – extreme lightweight and high power omni-directional sound source and our Qoms2 – the perfect sound source for room acoustics measurements !

Come and have a look at stand 39 (which this year we are sharing with Weles Acoustics) or for an individual appointment, please send us a quick message via qsources@qsources.be

Co-operation with Balaz Bauphysik

Balaz Bauphysik and Qsources met for the first time at the DAGA conference in Stuttgart in March 2022 where Agostino Troll – acoustician at Balaz Bauphysik – was immediately impressed by the excellent sound power to weight ratio of the 3.1 kg Qohm omni-directional sound source. Both companies kept in touch which resulted in the purchase of the Qohm – sound source and the Qam – amplifier by Balaz Bauphysik.

HEAD acoustics showing excitation with multiple Qsources light weight shakers on a smart cleaner device.

The sound emission of the new autonomous devices surrounding us is specially critical. On the cleaner device, shown on the HEAD acoustics booth, several excitation locations were prepared. The set up shown on Sensor and Test in Nuremberg Germany allows application of various techniques, contribution analysis, FE model correlation, etc.  

Qsources light weight shaker on electronics board combined with Polytec laser doppler on Sensor and Test Nuremberg Germany

As an example of controlled high frequency excitation of electronics, Polytec showed  the measurements on a microprocessor component mounted on a large board. The Qlws shaker was used for sine sweeps between 250 and 10000 Hz. 

Extension of Polytec’s portfolio with a Qsources structural excitation solution

10th May 2022

  • Vibration Measurement system offering
  • Small exciters, +/-25 mm, for limited spaces and covering a broad frequency range from 250 Hz, or lower, up to 13000 Hz.
  • Providing an versatile and stable excitation for  moderately sized structures and systems.
  • Ideal addition to the Optical Vibration Measurement solutions currently offered by Polytec.

HEAD acoustics expands its portfolio with Qsources structural excitation solution

9th May 2022

  • HEAD acoustics to include the Qsources’ Qlws lightweight shaker, and supporting amplifier, into its structural analysis solutions
  • Qsources excitation solution for efficient and accurate transfer function data gathering to support modal analysis, transfer path analysis and model correlation applications
  • Small exciters, maximum dimension smaller than 25 mm, for limited spaces and covering a broad frequency range from 250 to 13000 Hz
  • Providing an excitation solution for many moderately sized systems in the sound quality critical frequency range.

Qsources’ position on the invasion of the Ukraine by Russia

We, at Qsources, are convinced that the current attack and lasting partial occupation of Ukraine by Russia is a danger to all democratic and free countries in Europe and worldwide.  This is a catastrophe for the Ukrainians but also in a lesser degree for most Russians, both are paying the price for this.

At Qsources we are implementing whatever we can to prevent that we contribute to the financing the current Russian regime.  To be extended:

  • no more tanking at LukOil
  • limiting our carbon based energy consumption (of all sorts) to a minimum
  • scanning our supplier base for Russian ownership, regardless of the location of production
  • we will also no longer supply any products nor services to Russia as long as the current regime is in place


Let’s be clear !  In our view Russia has no right to occupy territories outside of Russia. Given the blatant lack of respect for international law and human rights we are in favor of suspension or cancellation of the rights with regards to the ownership and rights of residence for all Russians outside Russia who have profited and done well under the current regime.

Demonstrating vibro-acoustic reciprocity with a vacuum cleaner!

Our smart vacuum cleaner is just one of the lightweight mechatronic devices buzzing, humming, groaning and scraping around us.

Demonstrating the principles of vibro-acoustic reciprocity on this will not directly improve its sound. However accurate measurement data of vibro-acoustics will improve both numerical models and the understanding of the operational loads on the device.

Vibro-acoustic reciprocity between 300 to 7000 Hz, captured with just a tiny accelerometer, microphone, very small shaker, volume acceleration point source and, not to forget, our vacuum cleaner, is a way to show Qsources has accurate small scale excitation covered !

We had fun putting this demo and video together and, as a bonus, now have a far better understanding of our vacuum cleaner ! It hopefully provides you with an idea on the wide range of potential applications of our products aimed at making the world a more quiet place.

The most powerful, lightweight sound source & amplifier for building acoustics: Qsources Qohm & Qam

Check out our latest video for Qsources Qohm and Qam.

Qohm is the ideal sound source for different acoustic measurement situations:
– Room acoustics
– Building isolation testing
– Facade isolation testing
– etc.

This source is extreme lightweight & powerful. Request your demo via our contact form.

Sound source suitability for in-situ noise barrier measurements

KU Leuven (Belgium) & Qsources analysed sound source suitability for in situ noise barrier measurements according to EN 1793-5:2016.

This method aims at optimizing the reliability of field measurements of reflection and scattering on barrier surfaces. Measurements took place at the Laboratory of Acoustics at the Department of Physics and Astronomy of KU Leuven.
Qoms2 (monopole omni-directional source) as well as Qohm (lightweight high output dodecahedron) were measured in comparison with a conventional sound source. During this study the direct sound arrival was analyzed using a microphone grid placed in a large reverberant room. Impulse responses where measured using different settings of the DSP controlled Qam measurement amplifier.

A preliminary analysis showed significant differences between the sound field characteristics of the Qsources devices and the ones of the conventional sound source, indicating a potential advantage of the Qoms2 source.

Other interesting tests such as measurements against surfaces with different absorption characteristics are planned in the near future.
Qsources would like to thank KU Leuven and Prof. Dr. Christ Glorieux for the cooperation.

Determining sound power of fixed machinery

This article investigates how to measure sound emission in an acoustically complex environment by using a reference sound power source.

The reference source method provides fast and low complexity measurements of sound power on-site in arbitrary acoustic environments.
Qsources Qref , a small and lightweight sound power reference source, was used to improve the accuracy of the sound power reference method.

This blogpost was based on an application note and can be read in full via below link.

 Frequency Response Function (FRF) testing

Watch the recent Simcenter on-demand webinar about boosting digitalization in noise and vibration (NVH) product development and see our Simcenter-products being set-up and used.

Simcenter-Qsources Q-MED Low Frequency Monopole source was used for excitation in vibra-acoustic transfer function measurements.

Q-HSH High frequency shaker was used for modal analysis of CAE correlation. This shaker ensures excitation without damaging the surface with low hardness and changing dynamic stiffness of the structure.

Acoustic transfer function measurement executed in this webinar included Q-MHF Mid High Frequency Volume Source. This source was used to artificially generate noise from outside the vehicle.

In this webinar, you will learn how hybrid modeling uses test and CAE data, how FRF test data can help improve CAE models & how acoustic FRFs support vehicle package NVH design.

Acoustic comfort in atria and large halls

This article discusses acoustic comfort in atria and large halls & the effects of transparent foil roofs.
This study was presented by researchers of the Slovak University of Technology in Bratislava in cooperation with KU Leuven faculty of architecture.

The low frequency measurements conducted inside the building of the Berufsbildende Schule in Oldenburg, Germany included In-situ reverberation measurements, Sound pressure level decay
and Numerical analysis using room acoustic software.

Thanks to Monika Rychtarikova, Daniel Urbán, Carl Maywald, Lukáš Zelem, Magdaléna Kaššáková and Christ Glorieux and the team of KU Leuven and STU Bratislava for supporting the use of the article

Challenges of acoustic measurements in performance sites….

In measurement situations where control of sound quality and intelligibility are crucial factors, there can be certain challenges to be taken into account. These type of room acoustic measurements include:

  • Room Impulse Responses
  • Reverberation Time
  • Speech Transfer Measurements

Learn why a monopole sound source outperforms dodecahedron speakers.

Infra-Qsources Equipment Rental

Impress your clients using state-of-the art Infra-Qsources equipment.

Use the most lightweight equipment: no worries taking your equipment on-site & enjoy the easy set-up or simply try the Infra-Qsources sound sources & amplifiers for your project prior to purchase.

Infra-Qsources rental equipment allows you to use specific, “niche” measurement equipment for projects you don’t have to do on a routine basis.

Qsources developed a custom miniature Wind tunnel reference sound source for TU Delft Aeroacoustics & Wind Energy Research Group.

QindW is a custom miniature sound source with very low diffraction and excellent omni-directionality. A narrow and long design allows minimal impact on the flow and minimal feedback from the flow on the source output.

This Low Turbulence Tunnel experiment was part of the NWO-TTW THAMES project: Towards High-Reynolds Airfoil self-noise MEasurementS. The goal was to understand how to improve noise measurements in closed wind tunnels, with particular application to wind turbine blade noise studies. 

Low Frequency Sound Source Q-MED

Q-MED is a low frequency monopole source designed to measure vibro-acoustic transfer functions in and around vehicles.

The negligible diffraction makes it an accurate omnidirectional sound source up to 2,000 Hz. allowing typical vibroacoustic body noise transfer functions measurements including frequency response functions (FRFs).

A recent Siemens Simcenter blogpost provides a step by step approach to obtaining the most accurate results using corrected values for analysis and comparison to avoid influence of the source on the measured FRF.
This article explains how to use the data from the Q-MED calibration report as well as post processing calculations to account for variations of source sensitivity and applying corrections in amplitude.

Qsources

ISO9001:2015 Certification

Following the audit of SGS, a leading company in inspection, verification, testing and certification, Qsources has successfully gained certification to ISO 9001:2015. The main feature of the ISO 9001 Quality Management system is offering a customer central approach including overall performance improvements and risk-based thinking. We at Qsources are proud to have gained this acknowledgement.

Simcenter Qsources Q-ISH used in modal analysis

A recent Siemens Simcenter blogpost discuses test-calibration of mode shapes. The test set-up includes Qsources Q-ISH integral shaker on the SimRod, a full electric sportscar at Siemens Simcenter. Control of the mode shapes allows modifications to increasing the range of a vehicle and optimizing the drivetrain.

Next to CAE based modal analysis the actual testing supports a balanced development.  However, testing can become expensive. The example of the Simcenter Qsources Q-ISH integral shaker shows that excitation and calculation can be performed in an easy and fast manner. The compact shaker can be attached and positioned easily under any inclination and has a patent protected self-aligning stinger-suspension system. This way the shaker can be mounted directly on the relevant excitation location.

McGill university in Montreal Canada installed a large set of Qohm sources with dedicated equalization equipment.

In the recording research centre at McGill, the very light weight omni-directional sources are used in experiments to influence musicians during their performance recording using replay. And, a set of two of the same Qohm sources are also used when going over the world to investigate the acoustics of large performance sites with exceptional acoustic properties. See the 16 sources suspended over the recording area at McGill in the shown photo.