In Reply to: Measurement environment posted by Wayne Parham on September 29, 2002 at 13:16:24:
Wayne,If nothing else, you certainly are amusing. There are not many rooms that are anechoic down to 20Hz. It would take 4 meters of insulation on each wall and the ceiling and even then you wouldn't get complete absorption. Commercial woofer measurements ARE taken outdoors. If there is an exception to that statement, I'd be very surprised. If you've got a signal to noise ratio of 30dB (eg. 80dBSPL signal, 50dBSPL noise floor), the advantage of lowering the noise floor further (for example by moving into an anechoic room) in terms of measurement accuracy from MLS is on the order of .0001dB--I think outdoors is good enough.
I'm curious Wayne, if you never measure, how do you manufacture phase data? How do you find the acoustic centers of your drivers? It's bad enough that you sell speakers you've never measured, but when you say measurement is worthless, it's just plain idiocy.
John
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Follow Ups
- Re: Measurement environment - hancock 13:38:55 09/29/02 (26)
- Measurement for DIY? or at all? - tomservo 13:38:04 09/30/02 (14)
- Re: Measurement for DIY? or at all? - Wayne Parham 22:00:08 10/03/02 (8)
- Re: Measurement for DIY? or at all? - tomservo 13:46:00 10/04/02 (7)
- Re: Measurement for DIY? or at all? - Wayne Parham 16:45:36 10/04/02 (6)
- Re: Measurement for DIY? or at all? - tomservo 09:51:02 10/07/02 (3)
- Re: Measurement for DIY? or at all? - Wayne Parham 12:06:36 10/07/02 (2)
- Re: Measurement for DIY? or at all? - hancock 16:28:38 10/07/02 (1)
- Re: Measurement for DIY? or at all? - Wayne Parham 17:01:51 10/07/02 (0)
- Re: Measurement for DIY? or at all? - hancock 17:55:30 10/04/02 (1)
- Re: Measurement for DIY? or at all? - Wayne Parham 01:27:30 10/05/02 (0)
- Re: Measurement for DIY? or at all? - hancock 07:44:15 10/01/02 (4)
- Re: Measurement for DIY? or at all? - Wayne Parham 22:51:01 10/01/02 (3)
- Re: Measurement for DIY? or at all? - hancock 23:24:30 10/01/02 (2)
- Re: Measurement for DIY? or at all? - Wayne Parham 00:47:02 10/02/02 (1)
- Re: Measurement for DIY? or at all? - hancock 07:36:31 10/02/02 (0)
- Re: Measurement environment - Wayne Parham 16:54:41 09/29/02 (10)
- Re: Measurement environment - hancock 23:07:48 09/29/02 (9)
- Re: Measurement environment - Wayne Parham 00:09:56 09/30/02 (8)
- Re: Measurement environment - hancock 04:17:52 09/30/02 (7)
- Re: Measurement environment - Wayne Parham 10:27:37 09/30/02 (6)
- Re: Measurement environment - hancock 10:59:54 09/30/02 (5)
- Re: Measurement environment - Wayne Parham 12:25:50 09/30/02 (4)
- Re: Measurement environment - hancock 12:45:32 09/30/02 (3)
- Re: Measurement environment - Wayne Parham 12:58:12 09/30/02 (2)
- Re: Measurement environment - hancock 14:00:43 09/30/02 (1)
- Re: Measurement environment - Wayne Parham 15:38:55 09/30/02 (0)