Recording in an office with pink noise generators

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    • #86107

      Hello everyone,


      I am new to this site and was wondering if anyone has had any experience with recording in areas that use noise generators (white noise, pink noise, or any other types)?


      My corporate office building apparently has pink noise generators to filter out city noise and other distractions.  My manager has informed me that wireless microphones, and shotgun microphones will not work in there at all, only wired cardio lavalier microphones.  


      Has anyone else experienced something like this, or have any insight?



    • #212605

      If the building manager speaks from experience, get a wired mic and use it. If he speaks from a suspicion based on what he thinks will happen owing to whatever it is he’s referring to as “pink noise,” take your wireless gear into the environment and do a test for yourself. Find out what the noise does to your audio; experiment to determine whether you can minimize the noise in post.

      If this truly is “pink noise” — as defined in physics — it will be producing interference over a broad spectrum and probably can’t be defeated easily. If it’s merely a hum, like a 60 cycle line hum, you can probably clean it up in post.

    • #212606

      What a misunderstanding of info from the building manager! Pink noise is filtered white noise, that is a broad spectrum AUDIO signal, which some people believe is a good masking agent. It raises the noise floor, so annoying outside sounds are less obvious. The raised noise floor is even, so you get used to it quickly. It has no effect on wireless activity. If it did, the authorities would consider it an interference source or a jammer. Not sure how the US authorities consider this kind of thing, but jammers are illegal here in the UK. Cable or wireless is immaterial. The microphones will hear whatever is there. The source of the pink noise can be by multiple sources, and at HF, directional mics will hear it as they get on axis with the sound sources, at the bottom end, it will be more omnidirectional.

      You will have to try the mics in the location and see what happens. Wireless will be no different. If the office is screened to prevent RF energy coming in or out – with mesh in the walls and perhaps metallic screening in the windows, then that is a barrier to radio mics if one is outside – it’s essentially a Faraday cage. Even then, inside the cage, radio mics work fine. It’s a classic case of a little understanding being turned into fact!

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