If you are taping content in the business world for on-line distribution you no doubt have come across RF interference from Blackberries, which are the platform of choice in the financial markets, in addition to many other industries.

The culprit, the RIM Blackberry is a Canadian based company, so it seem interesting that the solution to RF radio interference should come from yet another Canadian company, Clock Audio. Having used their C3-RF series, I have found both the Cardioids as well as the hyper-Cardioid to indeed filter all but the most worst of problems and even then there is only the slightest of interference. I would defiantly look to add these to your production toolkit which are also not that expensive, for example the C801E-RF is 293.00 each and Dale ProAudio, here in New York City is their preferred solutions provider.

Mics pictured: C301ERF, C31ERF, C801ERF