Sound intensity, also known as acoustic intensity, is defined as the power carried by sound waves per unit area in a direction perpendicular to that area. The SI unit of intensity, which includes sound intensity, is the watt per square meter.
Sound Intensity Measurement
- SUPPORTED STANDARDS: complies with Sound Intensity-based Sound Power calculation - Discrete points method (ISO 9614-1) and Scanning method (ISO 9614-2).
- UNMATCHED FLEXIBILITY: measurement of additional process parameters like vibration, video, and others, everything perfectly synchronized
- TRIGGER CHANNELS: automatize the process by using triggers to start and stop the measurement. Connect and assign the trigger channel from the robotic arm - and the measurement is synced with its movement.
- OFFLINE CALCULATION: sound intensity can be calculated in post-analysis using stored raw sound pressure signals from both microphones.
- SUPPORTED HARDWARE: plug and play support for different intensity probes from all the major manufacturers, integrating full remote control functionality for measurement control.
- IEC 61672 CALIBRATED: complete measurement chain of sound intensity solution can be calibrated according to IEC 61672.
- QUICK SOUND SOURCE IDENTIFICATION: effortlessly identify noise sources with an easy-to-use interface.
- ADAPTED FOR INDUSTRY: no need for the special environment makes it perfect for measuring big chillers, transformers, and other large-scale industrial applications.
- PHASE CALIBRATION: straightforward, automated phase calibration and correction with a single button click.
- LIFETIME FREE SOFTWARE UPGRADES AND SUPPORT: Our data acquisition systems come bundled with award-winning Dewesoft X data acquisition software. The software package is always evolving and new features are being added. We offer lifetime FREE software upgrades and technical support to all our users.
Sound Intensity Application Overview
Dewesoft Sound Intensity module offers a complete measurement solution, enabling the customer to use it for precise noise source location or sound power calculation, without the need for any special environment such as reverberation room or anechoic chamber.
Sound power measurement is a universally recognized method especially established to compare devices for their acoustic properties. Utilizing our fully-fledged and versatile solution, sound power measurements can be conducted regardless of the object of interest's shape or size with only a few requirements for the space or location of measurement.
Sound Intensity Application Overview
This way sound power can be obtained in any type of sound field. Moreover, this method enables measurement of devices that require specific and complex mounting to operate, making it impossible to determine their sound power through other methods. In situ measurements have never been simpler, or as powerful. Perfect for fast troubleshooting and conformance to factory measurements and it also excels in complex devices with residual noise where key interest is a sound power of a specific machine.
When it comes to noise source location, no other solution is as simple and intuitive to use as Dewesoft sound intensity. Depending on the direction of sound waves travel (from microphone A to B or vice versa), our plugin will display different values (positive or negative) as noise source moves along the axis of the probe. When the probe is perpendicular to the noise source (located directly above it), the visual control inside Dewesoft X3 DAQ software will toggle between positive and negative value. As this process is done for the horizontal and vertical alignment of the probe axis, the sound.
ISO 9614-2 - Sound Intensity Scanning Method
Sound intensity scanning method (9614-2) for Sound power determination offers rapid and fluent measurement procedure. This holds especially true for large devices.
Dewesoft solution shines with a very clear ans simple user interface and on-screen guidance for the user in regards to timing and scanning patterns.
The most powerful aspect is the support for the buttons on the Sound intensity probe, making it completely operational by a single person. Scanning method is meant to be simple and fast. So that is exactly what we want you to experience.
ISO 9614-1 - Measurement At Discrete Points
When more time is available or more detailed approach is necessary, segmentation method (ISO 9614-1) is the best possible option. Once an object is measured from all (usually 5) sides, sound power can be calculated. However, with our solution, it is possible to do a more detailed analysis of the result. The software maintains the levels for each segment and further sub-segmentation is possible to extract additional information about the device under test.
On top of all this, sound intensity probe buttons are supported for moving between segments and triggering start/stop of the measurement.
Accompanied by a simple visual user interface with an overlay on the top of the object image, our solution gives an intuitive view of the results and key quality parameters of measurement.
Seamlessly Covering The Complete Frequency Range
Our software offers the support for a range of intensity probes in their complete functionality. Each of them is coming with a selection of solid spacers providing corresponding microphone gaps at frequency ranges of interest.
We carefully selected the assortment of probes to ensure reliable and swift operation. All the supported intensity probes have been designed to switch easily between different microphone spacers. The complete frequency range is thus covered easily and fast.
One of a Kind - Easy To Expand Solution
Two additional analog inputs on the SIRIUS mini data acquisition system allows you to plug-in additional sensors - e.g. accelerometers or any kind of voltage sensors. This allows you to simultaneously measure and display other parameters and syncronise them perfectly with your sound signals.
In conjunction with GRAS 12AR power module, we offer a plug and play solution for sound intensoty probes that require 200V polarisation voltage, making it possible to use existing equipment as well.
Portable & Adaptable Sound Intensity System
We are committed offering the highest usability. Our advanced solution is completely portable. SIRIUS mini DAQ system is powered over USB from a laptop and can easily be taken and used anywhere.
Where 200V polarization voltage is required and portability is in question, we offer packages with G.R.A.S. Intensity Power Module Type 12AB that makes our solution adaptable to existing intensity probes while still maintaining “off-grid” portability.
When powered by batteries, the power module is seamlessly integrated into our fully portable Sound intensity measurement chain, ensuring up to 11 hours of battery life.
Modern measurement techniques and solutions all require a way to ensure the quality and compliance of the measurement chain. Dewesoft has recently put special efforts in this area.
Every Dewesoft SIRIUS DAQ device can thus be calibrated according to IEC 61672-3:2013.
Our Sound intensity solution also includes procedures for single frequency pressure accuracy and also phase calibration of the whole measurement chain using GRAS 51AC Sound Intensity Probe calibrator.
In addition, we also offer a complete service of filter calibration according to IEC 61260: 2014 standard.
Sound Intensity Measurement Case Study
The manual measurements with a sound intensity probe or a vane anemometer for a large number of measurement points are time-consuming and non-effective. The main reasons to do an automatization of such measurements are to achieve good repeatability, save time for other measurements, and improve analysis of the results.
On the other hand, the main challenge is, how to control the collaborative robot. The automated intensity probe measurements at Doosan Bobcat widely use the Dewesoft DAQ system - and Dewesoft X software with Sound Intensity plugin.
Read more about Automated Sound Intensity Measurement on Loaders Case.
What is sound intensity?
What is sound intensity level?
Sound intensity level (SIL) or acoustic intensity level is the level (a logarithmic quantity) of the intensity of a sound relative to the reference intensity value.
Is sound intensity same as sound pressure?
Sound intensity is not the same physical quantity as sound pressure. Human hearing is directly sensitive to sound pressure which is related to sound intensity. In consumer audio electronics, the level differences are called "intensity" differences, but sound intensity is a specifically defined quantity and cannot be sensed by a simple microphone.
What equipment do I need to measure sound pressure?
To measure the sound intensity you need to measure sound pressure and acoustic particle velocity.
Both can be measured with a microphone sensor or so-called sound intensity probe connected to a data acquisition system running sound recording and analysis software.
Dewesoft provides a turn-key solution for sound intensity measurement.
Does Dewesoft provide complete sound intensity measurement solution?
Yes. Dewesoft provides a turn-key solution for sound intensity measurement for any situation or environment.
Our solution comprising everything from sound intensity probes, high-end and high dynamic data acquisition system with included data recording, visualization, and analysis software.
Our software is easy to use with a simple visual user interface with step-by-step instructions for the user. It also offers lifetime FREE software updates and FREE support.
Which sound intensity standards does Dewesoft support?
Dewesoft sound intensity solution supports two international standards. ISO 9614-1 - measurement at discrete points and ISO 9614-2 - sound intensity scanning method.