Need to measure how low frequency (vibration) changes when going through different materials. The only possible way found is by using Spectroid app. However, have no idea of what settings to set up. Test environment would be:
Subwoofer, pointing to the top, inside an isolated box with a wooden board on a top (to mimic real life floors of the apartment). On the board - material that will be tested. And on the material the phone with Spectroid app running.
Can anyone tell what settings to use? Vibrations will have low dB values (almost silence to humans, but still can be felt with the body (if f.ex. laying on the board)).
Here are the settings currently available in the app. Can anyone guide me how to use all that...?