How to smooth airflow from a "buzz box" air pump?

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I'm using an air pump to create a flow of air for the air-assist nozzle of a laser cutter. One of these:

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It works great -- a little bit too great and I'll be adding a valve to reduce the volume a bit -- but the air pulses from the pump cause ridges on the laser-cut edges.

How can the pulsing be reduced so the air output is a stream rather than a pulse? Some ideas are:

  1. Put a chamber between the air pump and nozzle.

  2. Put a rubber bladder between the pump and nozzle to absorb the pulses. Maybe incorporate it into the above chamber.

  3. Constrict the airflow with an aquarium air stone just as the air enters the above chamber.

Thought I'd ask before experimenting in case there's something obvious I'm missing.

submitted by /u/anonymous3850239582
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