Description: oil heater / burner hum.

Description: The sound of elevator doors closing, going up/down, bell going 'ding-ding', and the doors opening.

Description: chain saw starts, runs and turns off.

Description: sewing machine.

Description: The sound of an elevator bell going 'ding dong'.

Description: The sound of an elevator bell going 'ding dong' and doors opening smoothly.

Description: Transformer hum.

Description: Road construction ambience.

Description: The sound of pouring a small piece of molten lead into cold water.

Description: The sound of pouring a small piece of molten lead into cold water.