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Echo on wireless lepel mics

  • 14-06-2016 8:08pm
    #1
    omega42
    Registered Users, Registered Users 2 Posts: 517 ✭✭✭


    Hi folks, hoping someone can help.

    I have 3 wireless senhisers (sorry about spelling) connected into a sound desk.

    They are used for interviews where each person is approx 1 - 3 feet apart.

    The problem is that when the 3 are on together their is really bad reverb / echoing. Its like 1 mic is picking up the other peoples voices. I've turned the sensitivity right down on all of them but no affect. Surely there has to be a way to get them all working together.

    Any advise is welcomed

    Omega


Comments

  • #2
    12Phase
    Closed Accounts Posts: 1,040 ✭✭✭12Phase


    It's basically impossible to avoid bleed between the mics if they're that close together, so you are always going to need to ensure there is no delay on the audio processing on its way back to the desk or at least ensure that any delays are in sync with each other.

    It's possible that the radio mics have a very slight delay due to how the audio is being transmitted and that because you're using three different packs, they're all slightly out of sync with each other, or more likely they might be interfering with each other's radio signals if they're all sitting on the same channel.

    Or, it could be how your desk is handling things.

    To eliminate any issue with the desk, plug in 3 normal wired mics and test to see if you still are getting some kind of delay. If not, it's the mics.

    You also need to ensure there isn't any interference (intermodulation) between the mic channels over the air.

    http://www.bhphotovideo.com/explora/audio/tips-and-solutions/purchasing-and-setting-multiple-sennheiser-g3-wireless-microphone-systems explains a lot about how to configure the mics correctly.

    Each mic should be on a different radio channel to avoid this. It's fairly straight forward to do. Just follow the above.

    Also bear in mind that radio mics used unregulated radio frequencies that can very occasionally be noisy/occupied by other equipment. So, you need to sometimes switch to clear channels. That can be done by just trial and error.

    Once everything is configured correctly and you don't have any weird delays being caused on the desk or computer you should be fine.


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