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Yes, you are right, I'm quite new to this forum but not to audio ;-) Yes, I am a (small) 100% independant company, and I offer services (mostly related to audio measurements but my key knowledge is software development and DSP).

Hello, first I'd like to thank you @daniboun for introducing me and my services regarding high performance audio measurements If somebody is located in europe (EU) my measurement service might be useful I offer 3 stages: 1) DIY: via remote...

Yes, this true and very helpful for the UMIk-1. No mixer HW. You can adjust the gain with some DIP switches on the PCB. But then you not calibrated anymore. The MM2 has a mixer HW, and this is more confusing rather than useful. It makes calibration dificult Therefore the UMIk1 is a very cool...

To make reliable SPL measurements (not relative frequency response or RT60) you will typically need a sound level calibrator. Some background Most USB mics have a HW mixer device (gain). When you change the gain, the SPL reading will change. Without an absolute reference level, a SPL measurement...

There exist some more sophisticated techniques for high SPL up to 180dB :) With coupled tubes for details https://www.researchgate.net/publication/357866639_DESIGN_AND_PRELIMINARY_REALIZATION_OF_HIGH_SOUND_PRESSURE_SOURCE_AT_1KHZ_BY_RESONANT_COUPLING_TUBES It is based on the approch from...

Currently I'm using something similar. a 2" high power pressure driver with a 3D printed chamber. My refernce mic is a 1/4" MK301E from Microtech Gefell A sweep level vs. SPL At present I focussed on maximum SPL with THD <3%. But, if have time I'll carefully analyse the low and very low...

First, I’d like to thank you, @achimago for disassembling APX555. Very cool and interesting. Therefore, no need to disassemble my APX555 ;-) Amir looked deeper into the HW, I focused on the SW With the APX framework you can perform measurements in 3 ways Benchmode Sequence-Mode External...

Here are calibrated selfnoise measurments from an MM2. The microphone was acoustically shielded 1/3 octave measurment and the FFT Chirping is clearly visible and audible. But you still can do good room acoustics measurements with it.

all these simple measurment mics, use capsules with a typical sensitiviy of 12mV/Pa with an SPL of 133dB RMS you get an input voltage of around 1V RMS. Typically, the (internal) FET starts clipping much earlier. There are some mods to improve this docjordan

Yes, I'm the owner of www.akulap.de www.dr-jordan-design.de www.akustik-messen.de akulap.de serves as a shop for all kind of article related to audio measurements www.akustik-messen.de has no shop, but on this this site I focus on background information I cover room-, building- and my...

Unfortunatly, I do not know of a reliable sound source that can can handle these levels at low distortion. You want to measure the distortion of the mic, not the speaker. Maybe using a professional IEC61672 1/4" capsule as a electrostatic soundsource in a small cavity. Typically you measure just...

Hello, the cheap Omnitronic mic has significant USB Chirping see background of usb chirping In addition, I created a lot of articles about background of measurment microphone covering low noise , high SPL, USB interfaces and so on background for measurement microphones In general all the...