pshap Posted March 2, 2010 Report Share Posted March 2, 2010 Amazingly enough I fit into the back seat of a Porsche convertible today with my 442 bag on my lap with the cameraman next to me shooting on his RED.... I had 2 wireless mics going, one on driver and and another on the passenger... They sounded fine. When I pulled up my boom however, I got a constant faint ticking sound that I could not figure out. It was not wind noise. It seemed to only happen when the car was running. I checked to see if my boom cable was touching anything on the car but it was clear of any contact with the vehicle. Needless to say I did not use the boom. Any ideas as to why the engine running would affect the boom mic? Boom mic is a Sennheiser 416..... Quote Link to comment Share on other sites More sharing options...
Q Posted March 2, 2010 Report Share Posted March 2, 2010 Did this "ticking" increase and decrease with engine revs? Quote Link to comment Share on other sites More sharing options...
RPSharman Posted March 2, 2010 Report Share Posted March 2, 2010 I get this faint ticking a lot when working in cars, but usually on the wireless when sandwiched between visor and roof. It is not rapid, nor does engine speed have any relationship. Very unusual for a 416 to pick it up. Perhaps it was coming through the 442 on that particular channel. Gremlins. Robert Quote Link to comment Share on other sites More sharing options...
studiomprd Posted March 2, 2010 Report Share Posted March 2, 2010 perhaps a watch, or clock?? Quote Link to comment Share on other sites More sharing options...
RPSharman Posted March 2, 2010 Report Share Posted March 2, 2010 perhaps a watch, or clock?? I think it's not ambient, if it's the same ticking I get. It sounds like the tick that the Lectros make sometimes when antenna switching. Quote Link to comment Share on other sites More sharing options...
Guest Ken Mantlo Posted March 2, 2010 Report Share Posted March 2, 2010 Was the Porsche a mid engine design and you're right up against the engine? If so, perhaps RF from the ignition is leaking through some unshielded cable of hardware. This was a common problem when installing after market car radios. Quote Link to comment Share on other sites More sharing options...
Lawrence Chick Posted March 3, 2010 Report Share Posted March 3, 2010 Hi, I read your post about the ticking noise, and encountered something very similar, I noticed a similar ticking noise when I have my handsfree wired to the handphone. At first I thought it was my handphone getting spoiled, but the moment, I pull out one side of the ear piece, it's gone. Also when I switch off the engine, it's gone, I think it's some RF spray coming from the car that it's being picked up by the handphone/handsfree, which is probably acting as an antenna. Besides that, I saw this tiny manual on an alcatel wireless usb modem, which recommends not using the 3G modem in the car, as it may interfere with the ABS Brake system on the car. Yeah, so I guess there might be a reverse happening, where the cars emits out RF too gving the ticking sound. Hope this helps. Lawrence Quote Link to comment Share on other sites More sharing options...
pshap Posted March 3, 2010 Author Report Share Posted March 3, 2010 Absolutely a gremlin...... Interesting how it affected a hardwired boom mic instead of the RF Lectros... perhaps the Lectro electronics have some sort of shielding... Quote Link to comment Share on other sites More sharing options...
studiomprd Posted March 3, 2010 Report Share Posted March 3, 2010 " perhaps the Lectro electronics have some sort of shielding... " not all RF interference is equal. different interference affects different things, and in different ways! lots of physics at work here... Quote Link to comment Share on other sites More sharing options...
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