The solution of noise measurement by using smart phones
Abstract: Now there're more and more people installing Apps on their smart phones to measure noise. For the purpose of communication quality, most of smart phones are attenuated at the low frequency, therefore using mobile phone with built-in microphone or external microphone to do
noise measurement, the low-frequency response is poor and can't be compliant with the standard IEC61672 Class 1. In order to solve this problem, we developed two types of digital microphone which convert analog signal to digital signal directly, then do communication with mobile phone through
USB port or by WIFI. It completely solved the problem of mobile phone analog part. Based on professional noise measurement APPs, the combination of a digital microphone and a mobile phone meets the standard of IEC 61672-2013 Class 1.Key word: digital microphone, smart phones, IEC61672 Class
1
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Document Type: Research Article
Publication date: 21 August 2016
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