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Groups > linux.debian.user > #239279
| From | David Christensen <dpchrist@holgerdanske.com> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: smart fans |
| Date | 2021-08-24 09:00 +0200 |
| Message-ID | <CPyzE-MZ-7@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <CPpG2-3DA-15@gated-at.bofh.it> <CPqVr-4j8-3@gated-at.bofh.it> <CPsud-5kS-5@gated-at.bofh.it> <CPuml-6FW-5@gated-at.bofh.it> <CPv8J-7bR-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 8/23/21 8:09 PM, Emanuel Berg wrote:
> David Christensen wrote:
>
>> Doubling the sound energy adds 3 db. So, the two loudest
>> fans are around 19 dB.
>>
>> The HDD is 2.9 Bel = 29 dB.
>
> So the total worse-case is 35.4 dB?
>
> (With the GPU, PSU and one fan still unaccounted for.)
>
> ;;; -*- lexical-binding: t -*-
> ;;;
> ;;; this file:
> ;;; https://dataswamp.org/~incal/emacs-init/audio.el
>
> (defun db (d &rest ds)
> (let*((all (cons d ds))
> (top (apply #'max all))
> (other (- (apply #'+ all) top))
> (double (/ other top 1.0))
> (res (+ top (* double 3))) )
> (format "%.1f dB" res) ))
>
> ;; (db 14.9 15.9 15.9 14.7 29.0) ; 35.4 dB
>
These are the equations and conversion factors needed:
Bel = log10(power)
power = 10 ** Bel
1 Bel = 10 dB
So, your calculation should be:
2021-08-23 23:42:34 dpchrist@dipsy ~
$ perl -e '$p=0; $p += 10**($_/10) for @ARGV; print 10*log($p)/log(10),
"\n"' 14.9 15.9 15.9 14.7 29.0
29.696732023509
That said, I would just add the continuous fan noise:
2021-08-23 23:42:49 dpchrist@dipsy ~
$ perl -e '$p=0; $p += 10**($_/10) for @ARGV; print 10*log($p)/log(10),
"\n"' 14.9 15.9 15.9 14.7
21.4058369416353
And consider the 29.0 dB HDD vibration separately.
David
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smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 02:00 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 02:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 03:10 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 05:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 05:10 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 05:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 05:30 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Reco <recoverym4n@enotuniq.net> - 2021-08-22 07:30 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 08:30 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:30 +0200
Re: FOSS "BIOS" (UEFI) The Wanderer <wanderer@fastmail.fm> - 2021-08-22 12:10 +0200
Re: FOSS "BIOS" (UEFI) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 13:30 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:20 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:30 +0200
Re: FOSS "BIOS" (UEFI) (was: Re: smart fans) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
FOSS "BIOS" (UEFI) (was: Re: smart fans) Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 07:30 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-22 09:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 09:50 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-22 10:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:10 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:20 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:50 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:10 +0200
Re: smart fans The Wanderer <wanderer@fastmail.fm> - 2021-08-22 16:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:20 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
Re: smart fans Hans <hans.ullrich@loop.de> - 2021-08-22 17:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 17:50 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 09:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:00 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:20 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-22 10:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:40 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:40 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 10:40 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 10:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:50 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 11:50 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 11:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 11:00 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 15:10 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-22 15:50 +0200
Re: smart fans rhkramer@gmail.com - 2021-08-22 16:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 16:10 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-22 16:30 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
Re: smart fans Gene Heskett <gheskett@shentel.net> - 2021-08-22 23:10 +0200
Re: smart fans Gene Heskett <gheskett@shentel.net> - 2021-08-23 00:20 +0200
Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-22 16:30 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 18:50 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-22 19:00 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:10 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-23 10:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:10 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-23 21:10 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 21:30 +0200
Re: smart fans <tomas@tuxteam.de> - 2021-08-23 21:40 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 22:30 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:30 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 22:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:20 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 21:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 22:00 +0200
Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-22 23:20 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:40 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:50 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-23 00:40 +0200
Re: smart fans didier gaumet <didier.gaumet@gmail.com> - 2021-08-23 09:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 22:20 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-22 23:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-22 23:50 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 00:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:10 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 02:40 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 03:00 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 03:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
Re: smart fans "Andrew M.A. Cater" <amacater@einval.com> - 2021-08-24 18:20 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:00 +0200
Re: smart fans Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-23 03:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-23 03:20 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 21:00 +0200
Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-23 22:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-23 23:00 +0200
Re: smart fans "Thomas Schmitt" <scdbackup@gmx.net> - 2021-08-23 23:30 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:50 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 01:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 02:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 03:00 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 04:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 05:20 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 09:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:20 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 23:40 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:40 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 00:20 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 02:10 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 04:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-24 07:30 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 09:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-25 00:20 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-25 01:30 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-08-29 01:00 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-29 12:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-04 00:10 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-04 03:50 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-04 04:50 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-04 23:00 +0200
Re: smart fans Emanuel Berg <moasenwood@zoho.eu> - 2021-09-07 03:10 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-09-07 23:20 +0200
Re: smart fans David Christensen <dpchrist@holgerdanske.com> - 2021-08-24 11:20 +0200
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