Are there any downsides to... at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.


Reply
 
Thread Tools Search this Thread
Old April 9th, 2016, 04:44 AM   #1
Regular Crew
 
Join Date: Feb 2012
Location: Vancouver, Canada
Posts: 29
Are there any downsides to...

Are there any downsides to using a deadcat, even indoors when there is no wind, compared to a foam windscreen?
Bo-Ming Tong is offline   Reply With Quote
Old April 9th, 2016, 05:27 AM   #2
Trustee
 
Join Date: Apr 2008
Location: Cornsay Durham UK
Posts: 1,941
Re: Are there any downsides to...

There may be a small HF difference but I tend to keep mine on all the time as if you bang the mic off the ceiling or floor it protects it better than a foam windgag.
__________________
Over 15 minutes in Broadcast Film and TV production: http://www.imdb.com/name/nm1044352/
Gary Nattrass is offline   Reply With Quote
Old April 9th, 2016, 05:44 AM   #3
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
Re: Are there any downsides to...

The furry deadcat, which is typically installed over the foam, may get dirty easier, costs much more than foam if you have to buy/replace it, adds a bit of weight, makes the mic look larger, and is one more piece of gear to fuss with. The acoustic effects, in the absence of wind, should be minimal, but you would have to judge whether or not they are a factor in you application. I only use one under windy or potentially windy conditions.
__________________
dpalomaki@dspalomaki.com
Don Palomaki is offline   Reply With Quote
Old April 9th, 2016, 06:08 AM   #4
Trustee
 
Join Date: May 2004
Location: USA
Posts: 1,553
Re: Are there any downsides to...

I agree with what has been said but I've filmed indoors without protection and then in the middle of a theater performance the central air comes on.
Pete Cofrancesco is online now   Reply With Quote
Old April 9th, 2016, 09:21 AM   #5
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
Re: Are there any downsides to...

OK. I ran a quick test as follows:

Mic - A Rode NTG2 with their supplied foam and deadcat.
Phantom power and capture via TSCAM US-399
Captured into Adobe Audition 3.0 at 44.1 sample rate
Signal used for comparison was 10 seconds of white noise generated by Audition played over some KLH 2-way small speakers.
Mic in shock mount on stand about 24" from the speaker, about 12" of axis.

Average RMS levels
Mic only taken: as 0 dB
mic with foam: --2.7 dB relative to mic only
mic with foam and deadcat: -6.8 dB relative to mic only (-4.1 relative to mic and foam)

However, it is not that simple.
Did a frequency analysis of the three options and note that most of the difference is in energy at frequencies above around 6 kHz. Below that frequency there is not much difference (allowing for the nature of white noise). I suppose a sweep of a pure tone might have been better but I didn't have time to set it up.

My take on this is that the dead cat (and foam for that matter) will hurt high frequency components but would not be an issue for lower frequencies and voice (e.g., AM radio bandwidth).

I have attached two screen grabs showing the frequency variation for about 9 seconds of the test.

With respect to central air condition; the cat would help if the mic is in a strong draft or air stream, but would not likely help the low frequency rumble common through the room.
Attached Thumbnails
Are there any downsides to...-cat_over_foam.jpg   Are there any downsides to...-foam_over_mic.jpg  

__________________
dpalomaki@dspalomaki.com
Don Palomaki is offline   Reply With Quote
Old April 9th, 2016, 09:06 PM   #6
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,298
Re: Are there any downsides to...

Make that a TASCAM US-366.
__________________
dpalomaki@dspalomaki.com
Don Palomaki is offline   Reply With Quote
Old April 10th, 2016, 04:44 AM   #7
Trustee
 
Join Date: Apr 2008
Location: Cornsay Durham UK
Posts: 1,941
Re: Are there any downsides to...

NTG2 is a pretty average mic but having had an NTG1 leaving the softie on will probably improve the sound quality as they tend to sound quite fizzy with the usual midrange electret suckout.
__________________
Over 15 minutes in Broadcast Film and TV production: http://www.imdb.com/name/nm1044352/
Gary Nattrass is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:18 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network