I'm a student studying sound and i and recording sounds this is one of the recordings. This sound was created by holding the microphone behind a t. V on a static channel.
Recording of a bladeless fan or ventilation system in a hall at saxogade, vesterbro. The recorder is close to it. Feel free to download and use it, but remember to credit me. (rl).
I cleaned up the valve sound from https://freesound. Org/people/grotelue/sounds/96935/used audition to do noise reduction and manually edited out the people talking in the background.