Why does Cinemachine impulse fade out before reaching the listener?

Default Distance and Dissipation Rate are too aggressive. Increase source Default Distance to your scene's typical camera-to-event range; lower Dissipation Rate.

How long the wave takes to expand from source. Longer Spread Time = slower-arriving but more sustained shake. Tune for distant explosions vs close hits.

Set Distance Limit on the source. Beyond that, listeners ignore. Useful for large levels where you don't want explosions on the other side of the map shaking the camera.

Fix: Cinemachine Impulse Decays Too Fast

Quick answer: Source Default Distance ~scene size. Dissipation Rate 0.5..1.0. Spread Time tuned for arrival timing.

Distant explosion at 50m. Camera at 30m. Listener barely registers. Default attenuation kills the wave too quickly.

The Fix

CinemachineImpulseSource:
  Default Distance:      50      // units; tune to your scene
  Dissipation Distance:  100
  Dissipation Rate:      0.5
  Spread Time:           0.2
  Distance Limit:        75      // hard cap

Listener (vcam extension):
  Channel Mask:          Default
  Gain:                  1.0

Default Distance is the canonical falloff scale; raise to suit scene units. Dissipation Rate < 1 means slow decay over distance.

Verifying

Test source at varying distances. 30m: strong. 75m: just-perceptible. 100m: silent.

“Bigger distance. Slower decay. Listener feels.”

Related Issues

For Impulse channel mask, see channel mask. For Impulse listener, see listener.

Tune distance. Listener feels.