13DUb

Using an analog "buttset" or test-set telephone, clipping the leads from an EXFOMAXTESTER device and hearing the tones from testing ...

Helicopter flying over house, looped, cellphone mic. Delay and reverb automated.

drill rev

drill double rev

Stutter and dial-tone blips.

Old bulb shaped bell with metal arm and chain to pull and ring.

Small chain link (5-6) dropping on metal box (hollow)