Så der basss

http://www.youtube.com/watch?v=GWipxFTSeyw&feature=relat ed

må lige være noget for alle trampertosserne

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Diy med dunk i brystet

gg

Husker en artikel om denne, den skulle være så kraftig at den kunne ændre vejret omkring sig .
MOAS (mobile acoustic source)


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vh Hans Lund

D A O skrev: MOAS (mobile acoustic source) Husker en artikel om denne, den skulle være så kraftig at den kunne ændre vejret omkring sig .

Og smadre dine trommehinder på få sek

gasolin skrev: D A O skrev: MOAS (mobile acoustic source) Husker en artikel om denne, den skulle være så kraftig at den kunne ændre vejret omkring sig . Og smadre dine trommehinder på få sek

Det tror jeg gerne, man skal nok stå noget bagved den :-)
Men pyt den passer heller ikke ind i min stue ha ha


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vh Hans Lund

D A O skrev: gasolin skrev: D A O skrev: MOAS (mobile acoustic source) Husker en artikel om denne, den skulle være så kraftig at den kunne ændre vejret omkring sig . Og smadre dine trommehinder på få sek Det tror jeg gerne, man skal nok stå noget bagved den :-) Men pyt den passer heller ikke ind i min stue ha ha

Skal da bruges istedet for ipodden og til grilfesten med helstegt pattegris

Det jeg læste dengang er dette her

The siren principle—modulation of an air flow by opening and closing of holes—can
also be used to produce sound of arbitrary waveforms. One example of such an infrasound-
capable siren speaker is the Mobile Acoustic Source System (MOAS) that the National Center
for Physical Acoustics at the University of Mississippi built for the Battlefield Environment
Directorate of the U.S. Army Research Laboratory.204 This unique system can provide 20 kW of
acoustic power through an exponential horn of 17 m length and 2.3 m maximum diameter; the
cutoff frequency is 10 Hz. It is mounted together with the 115 kW Diesel compressor on a tele-
scoping semi-trailer. Here, a cylinder with slits on the circumference is moved electrodynamical-
ly past corresponding slits on a fixed cylinder, thus the air stream can be modulated by the
current in the driving voice coil. From 63 to 500 Hz the on-axis frequency response is essentially
flat, about 152 dB at 1 m radius for an equivalent point source; below, it falls to about 130 dB at
1 m at 10 Hz. From the first number, one can compute that the on-axis level decreases below 137
dB, about the pain threshold for unprotected ears, at 5.6 m from the assumed point source
(located in the center of the horn opening), i.e., already in the immediate vicinity.205 The 120 dB
range is 40 m. For infrasound, the increasing pain threshold and decreasing horn efficiency com-
bine to prevent ear pain even close to the mouth of the siren, again demonstrating the difficulty
of producing very high low-frequency amplitudes in free air. The main purpose of the MOAS is
to test atmospheric propagation over many kilometers; another one is to simulate vehicle noise.
The strong non-linearity in the device does not hamper these applications.

20 kW of acoustic power through an exponential horn of 17 m length and 2.3 m maximum diameter
Ja det er altså bare vildt meget i akustisk energi og som der står man testede "The main purpose of the MOAS is
to test atmospheric propagation over many kilometers;" yes moderne krig med lyd man sender bare 10 hz mod et hus 3 km væk eller sætter den foran ens swimmingpool og får et dampbad ud af det !

Uden lyd (musik) ville livet være kedeligt


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