Microphone Input Noise Comparison – Avisoft Bioacoustics

Noise Performance Test Sound Files In order to evaluate the noise performance of the various recorders in combination with different microphones, the sound of an electronic alarm clock has been recorded subsequently with three different microphones and various recorders. All recorders were set to their maximum gain. The test arrangement was fixed throughout the entire test procedure (the distance between the clock and the microphones was 1 meter). The columns labelled “normalized” contain the normalized sound files. In order to compensate for the different input sensitivities of the various recorders, the normalization was done in such a way that all files exhibit a virtual input clipping level of -60 dBu (the original files were digitally amplified according to the previously measured input clipping levels listed above). Note that this kind of normalization does not compensate for the different microphone sensitivities. So, for evaluating the absolute equivalent noise levels of the v ... Read full article.