November 22, 2015 at 12:03PM

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Interior car audio.

Hello

Im filming a short narrative that takes place in a moving car. A driver and a rear passenger are having a conversation. We dont have budget to get a professional sound person,process trailer or for much FX work..and car has to be moving. We did a test with a shotgun style mic and got alot of bg noise from the car during the dialog. I know we can use post filters to remove some of it but would like to get clean audio on location. Any tips on how to minimize the car noise..would using lav mics help? We shooting on a 5d ,have a H4n and two shotgun mics and would maybe be able to get some lav mics..any ideas. Thanks in advance

3 Comments

A shotgun is a terrible mic to use inside a car, especially the low cost shotguns like the Rode NTG-1 or NTG-2 mics.

I would definitely use hidden lav mics that are close to your actor's mouths but hidden under clothing or taped to the inside roof of the car. If you have room you could use a small condenser mic like a Rode NT5 or an Audio Technica 4053b mic which would pick up less background noise if positioned close enough, but well positioned lav mics might be the best bet. You could use iPhones or small recorders like the Tascam DR-05 to power and record the audio from your lav mics.

November 24, 2015 at 10:06AM, Edited November 24, 10:07AM

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Guy McLoughlin
Video Producer
33111

Awesome! thanks for the response. Would the H4N work in place of the Tascam?

November 24, 2015 at 4:05PM

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Jaime Hernandez
director / DP/ editor
74

>>>Would the H4N work in place of the Tascam?

Yes, sure. It's a lot bigger, but if that's what you have then why not. What you will want to use is a lav mic that has a 3.5mm connector that you will plug-in to the external mic input socket which is on the side of the H4n near the top XY mics, and then make sure that you have "plug-in power" or "mic power" turned on in the H4n menu. Mic power is a 5 volt current applied to power the lav microphone. This avoids the whole expensive mess of having to use a XLR power adapter to power your lav mic.

I don't know if the H4n 3.5mm external mic input is stereo or mono, so you might be limited to using just one mic with your H4n recorder. I normally use one recorder per lav mic because it's a simple set-up ( hard to screw up ), and it allows people to move around freely without being joined together by mic cables.

Make sure you test your levels and check the recording with your audio editor before using this set-up for a shoot. You want to make sure it's 100 percent before risking all the time and effort.

The best thing about lav mics is that they are a very low drain on batteries, so you can shoot for a really long time with them. I use Tascam DR-07 Mk2 recorders ( and the super tiny Tascam DR-10CS recorders ) with lav mics, and I get about 20 hours of recording time with the DR-07 and about 10 hours with the DR-10CS.

Last thing is to always record at 48 kHz 24-bit format, which will give you excellent quality sound for video work.

November 24, 2015 at 4:44PM, Edited November 24, 4:48PM

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Guy McLoughlin
Video Producer
33111

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