If you like horns...

This is a surprisingly clear explanation of how horns work. I don't know how accurate it is but it helped me understand the concept

.world's largest horn shatters glass
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Comments

  • OK, so it's obvious I'm inept at attaching links from Youtube, Let the laughter begin. But if you try that phrase in Youtube you should find it

    HT: Marantz NR-1603, Oppo 981, Def Tech SM55, SVS PB-1000
    BR: iPad Mini, Audio Engine A5+
    2C: Parasound ZDAC V.2, Sony DA80ES, Sony XDR-F1HD, SVS Prime Tower, JSE .6 Infinite Slope
    Office: MBAir, Focusrite Scarlett 2i2, JBL LSR-308
    Projects: Polk RTA12, Polk Monitor 7, Revox B225CD, BIC 3-TM
  • agfrostagfrost Posts: 2,251
    w9h1v2azarcs.gif

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    Apologies, your post led me to this place...

    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Marantz DV-9500 * Modded Adcom GDA-600 DAC * Rythmik F8
    Micro Seiki DQ-50 * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
  • agfrostagfrost Posts: 2,251
    Here's a hand with your link:

    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Marantz DV-9500 * Modded Adcom GDA-600 DAC * Rythmik F8
    Micro Seiki DQ-50 * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
  • mhardy6647mhardy6647 Posts: 21,236
    I just went in a big circle. ;)

    I reckon this is the YT video to which the OP was referrin'.


    Horns are simple enough in principle, they're acoustic transformers (impedance matching devices).

    In practice -- to make one that is well behaved across a broad range of frequencies... that's (still) a challenge!

    :)
  • mhardy6647mhardy6647 Posts: 21,236
    edited February 1
    The red horn on that video isn't particularly large; there have been numerous "room sized" horns built for hifi over the years. Steve Deckert at Decware turned a basement into a bass horn --- and cracked the foundation due to a problem with standing waves or resonance in the process :)

    Here's another 'crazy basement horn' (clickbait type of link, for which I apologize):
    https://gizmodo.com/horn-subwoofer-takes-up-crazy-mans-entire-basement-5025867

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    Nelson Pass's ironically named Kleinhorn (small horn auf Deutsch) is/was... well... moderately large. Probably about the same size as the one in the YT video, given the area of the mouth.

    https://www.passdiy.com/project/speakers/the-kleinhorn-part-1

    yccm0nu4ybgc.png

    Those Lowther drivers are nominally 8 inches in diameter, to give a sense of scale (or you may notice a tt on the shelf).

    :)



  • mhardy6647mhardy6647 Posts: 21,236
    the problem is that the speed of sound is fairly slow, so the wavelength of bass tones is pretty long. The wavelength of a 20 Hz sine wave (tone) is 56.5 feet.

    Thus, if one wants to make a horn with good performance at low frequencies, one usually folds the horn (like the Kleinhorn above, or the famous Klipschorn folded corner horn).

    Here's a straight 30 Hz (wavelength 37-2/3 feet) bass horn (well, a pair of 'em, by the looks of it).
    http://vincent.brient.free.fr/bass_horn.htm

    r43t7e6iv2ck.png
  • mhardy6647mhardy6647 Posts: 21,236
    edited February 1
    As Lt. Columbo would have said...

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    any discussion of horns is incomplete without...

    w6zrbhl8ng5h.png


    The Chrysler air raid siren.
    p1961bph90ya.png

    "Yeah, it's got a Hemi in it."

    vve92x2bmytj.png

    :)

    n0cn84zmwuuf.png


    rivoe1awq017.png

  • mhardy6647mhardy6647 Posts: 21,236
    Oh.
    And.
    To shatter a glass, you don't need a Horn(e), or even a Bassey.
    Just a Fitzgerald.
    Or a Memorex.



    B)

  • BlueBirdMusicBlueBirdMusic Registered User Posts: 408
    mhardy6647
    I love these horn postings.
  • mhardy6647mhardy6647 Posts: 21,236
    edited February 2
    Cool.
    I of course, am being completely ironic, posting that stuff.
    I mean, who could bear to listen to them old things?!

    ahem.
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