RTA (measurement system)

guru_jeff · 9th August 2006, 09:13 PM

My place of work is looking for a measurement system similar to the systems that are used for loudspeaker measurements. I have another post that I put up hear looking for what type of mic, preamp and software to use for my home loudspeaker measurement system and I assume they can be used as an RTA as well.

Please give me some feedback or other suggestions for some equipment to use. We do have a budget but it is more than my home budget.

This is what we are looking at right now.

RTA Link

We are using it to measure the noise output on some brushed DC motors with gearboxes. They are being measured in a sound box that was put together with foam insulation material.

My other thought would be something like PC RTA from Linear X
PCRTA

joe carrow · 10th August 2006, 03:06 AM

I remember that Cool Edit Pro (before it was bought by Adobe and turned into Audition) had some good analysis tools. I don't know if they made it into Audition, and I don't know if you can still pick up a copy of Cool Edit, but my main point is that you might not really need real time analysis.

If you're just measuring relative tweaks to a motor to see how they affect noise output, and you're not trying to come up with some sort of real-time control system, then taking a snapshot of the noise and post-processing it could be a cheap way to get 'er done.

EDIT: Check out Audacity (download.com) . It's free, and although I haven't tried it yet it looks like it can do some useful analysis.

guru_jeff · 10th August 2006, 04:00 PM

The RTA would be helpful because we will probably change motor RPM and or loading while it is being tested and it would save a lot of time instead of taking a sample at various data points.

bwaslo · 10th August 2006, 05:24 PM

PRAXIS at libinst.com can be used (in its demo/free mode) as a free RTA and pink noise generator, as narrow as 1/48th octave.

guru_jeff · 18th August 2006, 01:43 AM

How much does Praxis cost? I know you can get the free demo version. I heard they have a calibrated mic with the Aud pod package. How much is that? I sent an email to them but haven't heard back.
Any thoughts? Anyone purchased these before?

owdi · 18th August 2006, 02:27 AM

Quote:

Originally posted by joe carrow
I remember that Cool Edit Pro (before it was bought by Adobe and turned into Audition) had some good analysis tools. I don't know if they made it into Audition, and I don't know if you can still pick up a copy of Cool Edit, but my main point is that you might not really need real time analysis.

If you're just measuring relative tweaks to a motor to see how they affect noise output, and you're not trying to come up with some sort of real-time control system, then taking a snapshot of the noise and post-processing it could be a cheap way to get 'er done.

EDIT: Check out Audacity (download.com) . It's free, and although I haven't tried it yet it looks like it can do some useful analysis.

The waveform analysis in Audacity is pretty useless. You can't zoom or change scale, and the values shown on the x axis don't match the displayed chart very well.

Dan

guru_jeff · 18th August 2006, 02:29 AM

I'm not looking at Audacity because I haven't heard too much about them. I'm looking at Praxis, possibly ARTA and audio tester.

Thank you

9th August 2006, 09:13 PM	#1
guru_jeff diyAudio Member Join Date: Jul 2006	RTA (measurement system) My place of work is looking for a measurement system similar to the systems that are used for loudspeaker measurements. I have another post that I put up hear looking for what type of mic, preamp and software to use for my home loudspeaker measurement system and I assume they can be used as an RTA as well. Please give me some feedback or other suggestions for some equipment to use. We do have a budget but it is more than my home budget. This is what we are looking at right now. RTA Link We are using it to measure the noise output on some brushed DC motors with gearboxes. They are being measured in a sound box that was put together with foam insulation material. My other thought would be something like PC RTA from Linear X PCRTA

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Speaker Measurement System (Mic, pre-amp, software)	guru_jeff	Multi-Way	20	18th August 2006 01:57 AM
Easy Loudspeaker Measurement System Set Up	hongrn	Multi-Way	3	24th July 2006 08:56 PM
Measurement System DAAS32, what's this?	Gargamel2UcD	Multi-Way	2	1st December 2005 11:35 AM
Nice and cheap ( :D ) speaker measurement system	FullThrottleRic	Multi-Way	14	23rd December 2002 01:31 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

10th August 2006, 03:06 AM	#2
joe carrow diyAudio Member Join Date: May 2004 Location: San Francisco	I remember that Cool Edit Pro (before it was bought by Adobe and turned into Audition) had some good analysis tools. I don't know if they made it into Audition, and I don't know if you can still pick up a copy of Cool Edit, but my main point is that you might not really need real time analysis. If you're just measuring relative tweaks to a motor to see how they affect noise output, and you're not trying to come up with some sort of real-time control system, then taking a snapshot of the noise and post-processing it could be a cheap way to get 'er done. EDIT: Check out Audacity (download.com) . It's free, and although I haven't tried it yet it looks like it can do some useful analysis.

10th August 2006, 04:00 PM	#3
guru_jeff diyAudio Member Join Date: Jul 2006	The RTA would be helpful because we will probably change motor RPM and or loading while it is being tested and it would save a lot of time instead of taking a sample at various data points.

10th August 2006, 05:24 PM	#4
bwaslo diyAudio Member Join Date: May 2006	PRAXIS at libinst.com can be used (in its demo/free mode) as a free RTA and pink noise generator, as narrow as 1/48th octave.

18th August 2006, 01:43 AM	#5
guru_jeff diyAudio Member Join Date: Jul 2006	How much does Praxis cost? I know you can get the free demo version. I heard they have a calibrated mic with the Aud pod package. How much is that? I sent an email to them but haven't heard back. Any thoughts? Anyone purchased these before?

18th August 2006, 02:29 AM	#7
guru_jeff diyAudio Member Join Date: Jul 2006	I'm not looking at Audacity because I haven't heard too much about them. I'm looking at Praxis, possibly ARTA and audio tester. Thank you

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)