Re: smart fans

[Emanuel Berg <moasenwood@zoho.eu>]

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

-- 
underground experts united
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