Fan

Servo drill is buzzing while running at slow speed.

Short and loud burst of buzzing while servo drill is running.

Piece of metal is roughly slid across a metal cage of a big fan, causing it to rattle with feedback.

Knob of a table fan is being rotated, producing hard click.

Continuous and stable whirring of a kitchen fan.

Opening a wooden fan.

Head of a table fan is being rotated once, producing clicking sound.

Long office ventilation system sounds.

Small sized fan is turned on with a click and motor starts to run.

Long office ventilation system sounds.

Closing a fan abruptly.

Short office ventilation system sounds.