Facebook social media iconTwitter social media iconYouTube social media iconSubmit to Reddit

Boundary effect microphones

Description and application of the boundary effect microphone.


The original boundary effect microphone was the Crown PZM (Pressure Zone Microphone) so the boundary effect microphone is often referred to generically as the PZM.

In this mic, the capsule is mounted close to a flat metal plate, or inset into a wooden or metal plate. Instead of mounting it on a stand, it is taped to a flat surface.

One of the main problems in the use of microphones is reflections from nearby flat surfaces entering the mic.

By mounting the capsule within around 7 mm from the surface, these reflections add to the signal in phase rather than interfering with it.

FREE EBOOK - Equipping Your Home Recording Studio

Equipping Your Home Recording Studio

The characteristic sound of the boundary effect microphone is therefore very clear (as long as there are no other nearby reflecting surfaces).

It can be used for many types of recording, and can also be seen in police interview rooms where obviously a clear sound has to be captured for the interview recording.

The polar response is hemispherical.

By David Mellor Wednesday April 9, 2003

How to Avoid These 4 Huge Mistakes In Audio

Are you making these 4 simple mistakes again and again in your home recording studio? They are easy to identify and avoid, so you don't have to. Learn more...

Free Ebook - Equipping Your Home Recording Studio

Set up your home recording studio in the very best way possible. Learn how to select equipment and solftware all the way through from microphones to monitors. Learn more...

Welcome to Professional Audio

Come on the Audio Masterclass FREE COURSE TOUR. A short series of tutorials to welcome you to the challenging world of professional audio. Learn more...