Would u care to record Temperature, Humidity and calibrate your multimeter?

Discussion in 'How to Win Friends and Influence People' started by DANIU, Apr 29, 2016.

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  1. Azteca

    Azteca Friend

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    Yep. I see this as similar to recording wind speeds when firing a gun at a target from 10 feet away. Unless it's a damn gale, it really shouldn't play a part.
     
  2. Priidik

    Priidik MOT: Estelon

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    Good point.

    The wavelength is subject to changes in medium (through temperature in this case), not the frequency. Inside ear temperature should be pretty much constant.
     
  3. Serious

    Serious Inquisitive Frequency Response Plot

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    Yes, wavelength (and thus: room interaction, etc.) will change with temperature. As I mentioned, it might be interesting to measure room modes shifiting in frequency with changes in temperature, but the changes will be minor/unmeasurable for the relatively minor changes in room temperature we experience (especially for those with A/C).
     
  4. purr1n

    purr1n Desire for betterer is endless.

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    Why don't you first ask yourself what are trying to accomplish here? What are the requirements for accuracy? What are the main causes of error? Once you know these things, you will realize that it's not necessary to take atmospheric conditions into account or even calibrate multi-meters. I actually have answers that you seek but I won't give them to you because I want you to THINK rather than babble about confirmation bias and the effect of cosmic rays.

    The essence of science and engineering is to ask yourself what is the problem that needs to be solved and how to solve it given constraints of time, cost, etc. (engineering). Only a mindless moron would cite confirmation bias and specify the need to calibrate multimeters and measure error from atmospheric conditions before gathering requirements.

    P.S. We do this for fun, not for science. If you want science, go read Ethan Winer, Doug Self, nwavguy, or the sound-science section of HF. Please see guideline #6: http://www.superbestaudiofriends.org/index.php?threads/must-read-seven-simple-guidelines.3/

    While I am violating guideline #1, I only do this for the greater good and to prevent this site from turning into hydrogen audio.
     
    Last edited: May 2, 2016
  5. purr1n

    purr1n Desire for betterer is endless.

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    The most I've seen is small frequency shifts. For example, a peak in Grado headphones shifting a few cycles up or down.

    Seriously, I tire of all this shit. Why is no one approaching this from square one (see below)?
    1. What are trying to accomplish here?
    2. What are the requirements for accuracy?
    3. What are the main causes of error?
    I tire of going in circles. Any more lameness and this thread gets locked and @DANIU gets banned.
     
  6. ultrabike

    ultrabike Measurbator - Admin

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    AFAIK, wavelength and frequency are pretty closely related.

    I do not expect significant changes in response in room temperature ranges or even in somewhat less comfortable frequency ranges for most measurement equipment and even transducers.

    Putting things in an oven or a freezer is different. But those are not your typical listening conditions.

    IMO, temperature and humidity are not relevant parameters when we are talking about typical application ranges.
     
  7. purr1n

    purr1n Desire for betterer is endless.

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    Maybe we should take general relativity into account? The Eistein field and Maxwell equations might show some effect. Don't want to fall into confirmation bias.
     
  8. Priidik

    Priidik MOT: Estelon

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    The OP should have gotten his answer with one post, and all the brain farts and academic posing (where I took part) could have been omitted, I agree.
    Going further, wasn't there few examples of headphones with sensitivity to moisture. The cellulose drivers come to mind from Sony.
     
  9. purr1n

    purr1n Desire for betterer is endless.

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    Yup a lot of academic posing.
     
  10. Thad E Ginathom

    Thad E Ginathom Friend

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    That is about as likely as hydrogenaudio turning into SBAF

    :bird:
     
  11. zerodeefex

    zerodeefex SBAF's Imelda Marcos

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    Please sign off the internet and make some friends.
     
  12. JoshMorr

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    HAHAHAHAHAHAHHAHAHAHHA

    I would also recommend trying putting this much thought into sex with another human being.
     
  13. DANIU

    DANIU Taking a week off for being a dumbass - Rando

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    Thank you for your kind words.
     
  14. purr1n

    purr1n Desire for betterer is endless.

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    SR80i Liberated Driver.REPe426.jpg

    One measurement on 9/13/2011 70F and the other on 12/4/2011 50F. Other factors could include placement imprecision, driver age, etc. No one will be mistaking a Grado for a Sennheiser with a 20F temperature change. Are the results good enough for precision munitions? Probably not. Are they good enough for us to make some sense of them? Most certainly yes.
     
  15. firev1

    firev1 Friend

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    Just a lil more academics and a little perspective on why you really shouldn't give a shit besides measurements.

    You can easily calculate it out yourself, http://www.sengpielaudio.com/calculator-waves.htm from 1000hz @20C to 1000hz@30c the change in frequency using lookup tables is a mere 2.9Hz.

    As for amplitude changes given different speeds of sounds, the change in magnitude is much much smaller on the log scale if the stiffness of the air is really affecting driver performance.
     
  16. Tyll Hertsens

    Tyll Hertsens Grandpappy of the hobby - Special Friend

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    I would guess that the biggest effect of temperature swings is at high temps the sweat will make the seal better on the ear pads.
     
  17. Thad E Ginathom

    Thad E Ginathom Friend

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    [​IMG]
     
  18. dllmsch

    dllmsch Friend

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    We are in an age where people are arguing whether or not hi-res would make a difference. This is truely a couple of steps ahead.
     
  19. Armaegis

    Armaegis Friend

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    Muscles and flesh tend to be a bit more relaxed/pliable at higher temperatures as well, which will undoubtedly have a greater effect than whatever the headphone/microphone are experiencing.
     
  20. Thad E Ginathom

    Thad E Ginathom Friend

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    I should probably pay more attention to that on the Audioboob project.
     

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