Slow Wooden Door Creak

How it's made

Source

a dry hinge alternates adhesion and sliding. A 280-780 Hz friction fundamental, weak harmonics and a second hinge at 1.37 times its pitch follow irregular loading of the door.

Body

friction excites wooden panel modes near 135, 287, 518 and 861 Hz, damped in 45-160 ms; a broad 105-180 Hz cavity and short grain slips give weight without a latch or closing impact.

Envelope

pressure grows over 0.55 s, catches twice during travel, then relaxes over 0.45 s. The default movement ends at 2.85 s with a 150 ms safety tail; no room reverberation is baked in.

Modulation

pitch drifts about 8 percent around a rising then falling load curve; slip pulses slow from 27 to 11 Hz with irregular depth, and upper harmonics soften as pressure releases.

Layers

two unequal hinge voices, filtered rubbing noise, and 7-18 soft grain slips per second drive the damped wood. All attacks are rounded and the final output is DC blocked and faded.

Variation

seeded pitch, slip timing and loading wander; travel, pitch, binding and panel size distinguish a heavy oak door, a thin cupboard, a badly sticking door and a restrained quiet opening.

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