# Sources & Listeners

Some targets (in particular the Camera) can be shaken indirectly as if they were hit by a shockwave. The shake is then split into two separate components:

**Shake source**: Emits a shake in all directions around it, similar to a sound.

**Shake listener**: Receives shakes from all directions, similar to a microphone. The intensity of a shake depends on the distance of the listener to the source.

{% hint style="info" %}
There can be multiple listeners in the scene (for example 1 per Camera). This scenario is explored in more detail in [Multi-Camera](/shakefx/core/multi-camera.md).
{% endhint %}

## Camera

Here's how this looks for a Camera shake target:

A **Source** component is placed on the origin of the shake:

<figure><img src="/files/d5yNVQ2Ig5NXL2nz6VeL" alt="" width="375"><figcaption></figcaption></figure>

A **Listener** component is placed on the Camera game object:

<figure><img src="/files/QEoClnTPtziQXtRy3c5w" alt="" width="375"><figcaption></figcaption></figure>

## Attenuation Settings Asset

Attenuation Settings are defined in an asset that can be re-used across shake source components:

<figure><img src="/files/7l94Q1pa1oqWl7v62Yu8" alt="" width="375"><figcaption></figcaption></figure>

**Type:** Select the algorithm to use for shake attenuation based on the distance between the source and the listener. Always applied between **MinDistance** and **MaxDistance**.

* **Linear:** Intensity decreases linearly.
* **Exponential:** Intensity decreases using an exponential curve controlled by **Exponent**.
* **Custom:** Intensity is determined by a user-defined curve. The curve is evaluated using normalized distance for the X axis (0 = **MinDistance**, 1 = **MaxDistance**).

**Min Distance:** The distance at which the shake reaches full intensity.

**Max Distance:** The distance at which the shake reaches zero intensity.

**Exponent:** Higher values produce a steeper drop-off.


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