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Re: LF: + 7dB in 424uHz , convert to 2.5Khz ?

from [Andy Talbot] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: + 7dB in 424uHz , convert to 2.5Khz ?
From: Andy Talbot <[email protected]>
Date: Sun, 11 Mar 2012 13:05:15 +0000
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oops typo
should read ...     "for 848uHz, use 10.LOG(2500 / 848e-6) = 64.7dB    "

'jnt


On 11 March 2012 13:03, Andy Talbot <[email protected]> wrote:
> Subtract  10.LOG(2500 / 424e-6) = 67.7dB
>
> So +7dB  in  424uHz =  -60.7dB S/N in 2500Hz
>
> for 848uHz, use 10.LOG(2500/646e-6) = 64.7dB    (3dB difference, not
> 3.5dB as you state)
>
> 'jnt
>
>
> On 11 March 2012 12:55, Graham <[email protected]> wrote:
>> How  do  you  scale  these  uHz  d/b levels  to   other   bandwidth's ?
>>
>> If  the  b/w  is   848 uHz   is the   dB  level     + 3.5 dB  ?
>>
>> + 7dB  in  424uHz ,  convert to  2.5Khz   b/w?
>>
>> tnx -G.
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