• Audio

  Either crazy or right on?

  Posted by Steve Wargo on November 2, 2008 at 3:15 am

  On an infomercial shoot last year, we had a problem with occasional planes. The producer (from Sacramento) said that if we aimed a shotgun mic at the sky, we could later take channel 2 and use it to cancel the noise on channel 1. The talent was wearing a TRAM 50 on a Lectro 201.

  In theory, it sounds like it might make some sense but I’m not a sound person (according to my wife anyway).

  Steve Wargo
  Tempe, Arizona
  It’s a dry heat!

  Sony HDCAM F-900 & HDW-2000/1 deck
  5 Final Cut (not quite PRO) systems
  Sony HVR-M25 HDV deck
  2-Sony EX-1 HD .

  Steve Wargo replied 17 years, 10 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Ty Ford

  November 2, 2008 at 4:15 am

  Hello Steve,

  It’s about cancellation.

  First there are all the different frequencies made by the sound source. All of them need to be canceled.
  Second, they need to arrive at the two mics at exactly the same time. Not likely with an airplane

  Having said that, I have used two lavs, one of reversed polarity to reduce (not remove) HVAC noise. You would get some cancellation. Whether or not it would reduce the sound of the plane…..I’m guessing probably not. Change the way it sounds, sure but at what cost to the intended audio.

  Regards,

  Ty Ford

  Want better production audio?: Ty Ford’s Audio Bootcamp Field Guide
  Watch Ty play guitar
• 

  Ray Palmer

  November 4, 2008 at 2:49 pm

  Anyone that knows you Steve will say CRAZY!

  Ray Palmer, Engineer
  Salt River Project
  Phoenix, AZ
  602-236-8224 office
  There are three types of people in this world, those that can count and those that can’t.
• 

  Steve Wargo

  November 4, 2008 at 10:39 pm

  Thanks Ray. I know that I can always count on you.

  Steve Wargo
  Tempe, Arizona
  It’s a dry heat!

  Sony HDCAM F-900 & HDW-2000/1 deck
  5 Final Cut (not quite PRO) systems
  Sony HVR-M25 HDV deck
  2-Sony EX-1 HD .

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