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greg_mitch
Joined: 03 May 2006
Posts: 5320
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| Posted: Sat Apr 19, 2008 2:14 am Post subject: radioshack / harbor freight analog sound meter |
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Just picked this up from Harbor Freight for $30 and noticed it has an "output" on the side that is an RCA output. What is this used for? Can you hook this into a laptop's line in and then record sound levels while test tones are playing?
The manual that came with it actually mentions hooking it up to home theater equipment but that is all that it says. Pretty vague.
TIA
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sat Apr 19, 2008 2:38 am Post subject: |
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Yep - line out. I've used it with the line in on a computer to do low-frequency sweeps in my room.
SC
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Apr 20, 2008 7:12 am Post subject: |
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I think I have one of those ( in fact I have most thing's from the Radio Shack catalogue, especialy the 80's and early/mid 90's stuff )
How accurate are these?
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Sun Apr 20, 2008 2:19 pm Post subject: |
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Depends on what use them for. I think they're pretty accurate if you're using white noise to test SPL (broad-band). But, if you want to use them to measure specific frequencies, they're not linear, so you need to use correction.
I've played around with REW a little for sub calibration, which has a correction for the Radio Shack meters and some others.
http://www.hometheatershack.com/forums/rew-forum/
It's been low on my priority list, but eventually I want to try to EQ my subs and I'll use REW and the Radio Shack meter to measure the room response.
SC
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