Hi there,
in case you did not notice yet: An apple watch in combination with a suitable App provides you a recording device that can be brought close to action in a very unsuspicious way. Especially if you activate the Concert Modus of the apple watch, which ensures that the screen does not accidentally become active - one would see the active app in that case.
I use the App "Diktiergerät" on the iPhone and Apple Watch, which allows you to transfer the recordings from the watch to the phone quite easily. https://itunes.apple.com/ch/app/einfach ... 1177522900
In the attachment you find two unmodified samples, both recorded the in the way described above. The strange noice you hear in the second part is a ventilator, nothing to do with the recording method.
Hope this helps one or the other, Muffe