[LAD] A little quiz about audio measurements...

[Ralf Mardorf]

-------- Original Message --------
Subject: 	Re: [LAD] A little quiz about audio measurements...
Date: 	Fri, 28 May 2010 21:17:38 +0200
From: 	Ralf Mardorf <ralf.mardorf at alice-dsl.net>
To: 	Veronica Merryfield <veronica.merryfield at tesco.net>
CC: 	Linux Audio Developers <linux-audio-dev at lists.linuxaudio.org>
References: 	<20100528123116.GA4058 at zita2> 
<AANLkTimYc_TFtVixHNTCRXvj3n_LtCJQzOsyKFnXiXTh at mail.gmail.com> 
<20100528153747.GF4042 at zita2> 
<AANLkTim-FH9FRjAxxL9fwZ1nSG5K2yv3AXTYmpX9_BHN at mail.gmail.com> 
<4C000DC7.1030709 at alice-dsl.net> 
<719832DC-9545-4B5A-8D5E-EE5F7F962867 at tesco.net>


> [snip]
> > The times I have measured the power line frequency to check it's effect or otherwise, I have not measured it as exactly 50.0hz (when I lived in the UK). 
> >
> > Vrnc
>
> [snip]
>   

OT followup:

Oberhausen, Rheinland, Germany; power line frequency right now is at 49 
Hz, measured with a low cost energy consumption costs meter. Those low 
cost meters shouldn't be able to do correct measurements ;). The best 
test at home might be to compare the sound of a transformer with a 50 Hz 
sine wave.