Extra loud industrial machine generator start up and running
Loop of a medium pitched engine sound
Rapidly ascending fluttering multi-tonal zap
Distant constant low throbbing square waves
Electronic answering machine, with long end-of-message beep
Ambience inside hyperbaric/recompression chamber. Surging whining hum.
A mid tone cutting in and out randomly and modulating in pitch.
Digital tape answering machine clunk & beep at end of tape.
Coffee maker - bialetti Moka Express, assembling.