EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 3747 testing. ISO 3747 specifies a method for determining the sound power level or sound energy level of a noise source (machine or equipment) by comparing the measured sound pressure levels emitted by a noise source (machine or equipment) installed on site with those from a calibrated environment. .
Using these measurements, the sound power level produced by the noise source (or in the case of noise bursts or transient noise emission) in frequency bands one octave wide is calculated using these measurements. The sound power level, or applied frequency A-weighted sound energy level, is calculated using octave-band levels.
The method specified in ISO 3747 is suitable for all types of noise (constant, unsteady, wavy, isolated bursts of sound energy, etc.) defined in ISO 12001. The method is primarily applicable to broadband emitting sources. noise, sound. However, it can also be used for sources that emit narrowband noise or discrete tones, although measurement repeatability is likely to deteriorate later on.
The noise source being tested may be a device, machine, component, or subassembly that does not specifically move.
The applicable test environment for measurements made according to ISO 3747 is a room where the sound pressure level at microphone locations depends mainly on reflections from room surfaces. In ISO 12001, accuracy 2 (engineering degree) measurements, the background noise in the test environment is low compared to that of the noise source or reference sound source.
For the measurements made in the octave bands and the A-weighted frequency calculations made on them, information is given about the sound power levels determined according to ISO 3747 and the uncertainty of the sound energy levels. Repeatability conforms to ISO 12001, accuracy grade 2 (engineering grade) or ISO 12001, accuracy grade 3 (measurement grade), depending on the degree to which test environment requirements are met.
EUROLAB assists manufacturers with ISO 3747 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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