Nowadays, noise is one of the considerable factors in many products such as air purifiers, air conditioners, fans, and compressors. Numerous companies are actively addressing this factor right from the initial stages of research and development all the way through the production processes.
In this blog, we will explain details of the procedures and the equipment used to perform pass/fail testing for assessing noise generated by a product during the production process.
First, it's crucial to identify the goals of our testing. For instance, if our requirements are relatively basic, we can use the equivalent sound pressure level or maximum sound pressure level to evaluate our product.
On the other hand, for more advanced testing needs, we should conduct a comprehensive analysis using octave bands.
This initial step helps us determine the specific equipment required for the testing process.
Next, we have to find the necessary equipment such as a microphone and a Data Aquisition System (DAQ).
If we need a portable equipment, we can also use a handheld sound level meter.
Afterwards, we must configure the frequency weighting and testing duration. Typically, we select A-Weighted and Z (No Weight) settings. The 'No Weight' setting provides us with the unfiltered noise signal generated by the product, while the 'A-Weighted' setting simulates the response of the human ear.
It's worth noting that there are no specific regulations or standards governing testing duration. However, I'd like to offer some insights on this matter. To determine the optimal testing duration that balances reliable results and efficiency, we can conduct a mock-up test. This involves measuring the equivalent sound pressure for durations of 10 seconds, 30 seconds, 1 minute, and 2 minutes.
Subsequently, we should assess the deviation of results obtained at these time intervals in comparison to the 10-second measurement. If the deviation falls within the predefined criteria or less than 5%, we can confidently adopt the 10-second duration as our standard testing duration.
Finally, we proceed with the measurement process and compile a comprehensive report based on the obtained data.
The XL2 Analyzer is an all-in-one device that combines the capabilities of a Sound Level Meter, Acoustic Analyzer, Audio Analyzer, and Vibration Meter. This makes it a powerful tool for professionals in various industries.
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