[Home](./index.md) > [server](./server.md) > [ParticleEmitter](./server.particleemitter.md) > [setRateVariance](./server.particleemitter.setratevariance.md) ## ParticleEmitter.setRateVariance() method Sets the rate variance of the particle emission rate. **Signature:** ```typescript setRateVariance(rateVariance: number): void; ``` ## Parameters

Parameter	Type	Description
rateVariance	number	The rate variance of the particle emission rate.

**Returns:** void