Portable oil heater being dragged on its plastic wheels across a (slightly gritty) tiled floor. Close mic with tascam dr100. Cleaned up a bit (light compression).
Central heating heater unity sounds of it being hit as well as the pipes being struck and hit. Slow down for horror show. Zoom h2n with auto gain (bad choice).
A 3kw electric fan heater switches on, runs for a few seconds, then gets switched off, thus demonstrating my mastery over small electrical appliances. Olympus ls-5, built-in mic capsules, no filtering.
A broken space heater that clicks. Recorded with a zoom h5 using the onboard xyh-5 capsule to capture a stereo signal and a sennheiser k6/me66 for a mono track. Very minor post processing to balance the stereo/mono and pull the subs out of the side channels.
Recording of the sound of an electromechanical timer in an electrical outlet for engine heaters. Recorded with the built in microphone of a canon digital ixus 950 is camera (which could be used to record audio only). File straight off from the camera with the exception of id3 tags added with foobar2000 v1. 3. 4.