Is that to be expected?"Īnswer: You probably have a single antenna wireless systems receiver.Īs with any wireless system, whether it is a microphone or personal monitor, a single antenna system will be subject to occasional dropouts. Question: "I just bought an in-ear monitoring system, but sometimes the signal cuts out, then it comes back in. Musical passage experiencing multipath dropout.
You can also position one mic directly in the center of the podium and forget about a second mic. In this case, DO NOT manually activate both mics at the same time or the audio quality will be poor due to acoustical comb filtering. If you want the mics on either corner of the podium and the heads widely separated, connect the mics to the Shure SCM410 automatic mixer, which will activate one or the other, depending on which mic is picking up the better signal. If you want both mics activated at the same time, position the mic heads in the center of the podium, one on top of the other. AC SOUNDS LIKE A YELLING ROBOT HOW TO
Question: "Where can I get information on how to properly mic a podium with two Microflex Gooseneck mics? I want to avoid comb filtering." Essentially, this is the same as #1, but it is much easier.
Use an automatic mixer inserted into your main console so that the automixer can turn the microphones on and off as they are being used. Route the microphones to different loudspeakers. Reduce the volume of one of the microphones. I know some people route the lavs to different speakers, but when you have many scenes like that with many lavs, the routing can be quite a headache." Often I do not have time to reduce the volume to one of the mics to reduce the comb filter distortion. I get a comb filter-like sound when they do that. Question: "How do the theatre guys do it? I frequently have actors with lavs in their hairline or over their ears talk while hugging. Sibilant sound of "SH" between two active microphones. Shure KSM mics are condenser mics with transformerless outputs. If the hum field cannot be eliminated, stick with high-quality condenser mics with transformerless outputs. But many of these mics have output transformers that, like a voice coil, will also pick up the hum. These mics will perform much better in a hum field. ALL dynamic mics will pick up this hum field to some extent.Ĭondenser mics, like the Neumann's you have or the Shure KSM mics do not have voice coils. Other dynamic mics, like the Shure Beta 58A, have more effective shielding around the voice coil that also reduces hum. Some dynamic mics like the Shure SM7B contain an internal hum-bucking coil that reduces hum pick-up. Nothing can be added to these mics to control this. So, before I write to the other mic manufacturers, I want to ask you if you use a special kind of shielding in your mics that prevent this type of hum from electrical interference."Īnswer: The likely source of the problem is a hum field in your studio caused by the AC power lines.Īny type of dynamic mic, like the Shure SM57 or SM58®, contains a voice coil that is very susceptible to picking up the hum field. 
The Neumann mics (U87s and U64s) have no hum in any direction and work fine. If I turn the mics 90 degrees, the hum disappears.
Question: "In one small area of my studio near my mains circuit breaker/electrical panel, I have some type of electrical interference and all my microphones except the Neumann mics have hum when turned in a certain direction. You can actually choose to hear some of the most annoyingly common, along with helpful remedies suggested by Shure experts. This time around, you're in complete control. While we're all familiar with the unwanted sound of, let's say, guitar amp feedback, there are other issues that are a little trickier to identify and eliminate.Ĭontributors: Gino Sigismondi and Doug Totel
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