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Wikipedia equal loudness contours

images wikipedia equal loudness contours

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs. This work also investigated the response of human hearing to tone-bursts, clicks, pink noise and a variety of other sounds that, because of their brief impulsive nature, do not give the ear and brain sufficient time to respond. The Fletcher—Munson curves are one of many sets of equal-loudness contours for the human ear, determined experimentally by Harvey Fletcher and Wilden A. The report comments on the surprisingly large differences, and the fact that the original Fletcher-Munson contours are in better agreement with recent results than the Robinson-Dadson, which appear to differ by as much as 10—15 dB especially in the low-frequency region, for reasons not explained. Audio Engineer's Reference Book2nd Ed. Namespaces Article Talk. The high-frequency bands are wider in absolute terms than the low frequency bands, and therefore "collect" proportionately more power from a noise source.

  • Equal Loudness Curves (ISO)

  • An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness when. The curves you can see here are very old curves of from Fletcher-Munson.

    images wikipedia equal loudness contours

    The refined Robinson-Dadson loudness curves are now new standardised by. This is an equal loudness contour. If you're an audio engineer, you should know this.
    Be careful though about assuming hyperacusis in Autism which greatly interests me.

    Video: Wikipedia equal loudness contours Music Theory Tutorial 157 - Equal Loudness Contour

    Off-centre sounds result in increased head masking at one ear, and subtle changes in the effect of the pinna, especially at the other ear. A bump of only 3dB counts as 'very flat' in the world of speakers and headphones. By using this site, you agree to the Terms of Use and Privacy Policy. Unsourced material may be challenged and removed.

    Editors have permission to delete the "External links modified" sections if they want, but see the RfC before doing mass systematic removals.

    images wikipedia equal loudness contours
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    According to the ISO report, the Robinson—Dadson results were the odd one out, differing more from the current standard than did the Fletcher Munson curves.

    The latter has peaks and dips in the HF region.

    images wikipedia equal loudness contours

    The results did not differ much when I blocked the ear canal mounting the mic on an earplug, and what differences there were appeared only in the HF region. Real-life sounds arrive as planar wavefronts, if from a reasonably distant source.

    This article has been rated as Low-importance on the project's importance scale. Views Read Edit View history.

    An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness.

    The unit.

    Equal Loudness Curves (ISO)

    An equal-loudness contour is a measure of sound pressure, over the frequency spectrum, for which a. In many discussions on the Bose Pro Portable PA Community you will see references to Equal Loudness Curves (Contours).

    For the performing.
    Views Read Edit New section View history. At low frequencies the ear is purely pressure-sensitive, and the cavity formed between headphones and ear is too small to introduce modifying resonances. I have confirmed this by measurements using Sennheiser HD headphones, which are flat to 25Hz.

    The contents of the Fletcher—Munson page were merged into Equal-loudness contour. Yes, I did measurements first with the ear canal open and the small mic at the entrance but not blocking it.

    Unsourced material may be challenged and removed. This surprised me a bit at first, but I now conclude that the HF dip is mostly to do with the deliberate correction for side vs frontal presentation in the headphones and the resonant space they form over the ear.

    images wikipedia equal loudness contours
    Wikipedia equal loudness contours
    I have also ammended the text to explain the big errors that were discovered.

    images wikipedia equal loudness contours

    The Fletcher—Munson curves are one of many sets of equal-loudness contours for the human ear, determined experimentally by Harvey Fletcher and Wilden A. My 'state of the art head' is of course superior to any artificial one, and as I said, measuring 'behind the ear canal' is simply wrong when measuring headphones.

    WikiProject Professional sound production. This combined effect of head-masking and pinna reflection is quantified in a set of curves in three-dimensional space referred to as head-related transfer functions HRTFs.

    It would be helpful to label it I was forced to give in and all the links were taken down.

    4 thoughts on “Wikipedia equal loudness contours

    1. Hidden categories: Webarchive template wayback links Articles needing additional references from October All articles needing additional references All articles with unsourced statements Articles with unsourced statements from October All articles with vague or ambiguous time Vague or ambiguous time from May

    2. Links to results for the i-Pod and many other items, which I consider very valuable were taken down. Good headphones, well sealed to the ear, provide a flat low-frequency pressure response to the ear canal, with low distortion even at high intensities.

    3. This article has been rated as Start-Class on the project's quality scale. I assume that the horizontal axis of the graph represents frequency, but it is not labelled.

    4. At low frequencies the ear is purely pressure-sensitive, and the cavity formed between headphones and ear is too small to introduce modifying resonances. Routine measurements with an ear plug are less painful!