White Papers

2011-06-30T05:17:18Z

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== Bose White Papers ==

=== L1® ===
* {{Bose White Paper 1}}

* [http://www.bose.com/pdf/musicians/Whitepapers/Line6-Bose_whitepaper.pdf Amplifying a Wide Range of Acoustic and Electric Guitar Sounds Across the Stage and Throughout the Audience with Little Change in Tone or Level] Marcus Ryle — Co-founder & Vice President of Product Development Line 6 Incorporated, <br />Kenneth Jacob — Chief Engineer & Director Bose Live Music Technology Group
Summary: Amplified guitars are the source of some truly remarkable musical instrument
sounds. At the same time, we found they are the source of acoustical problems that
often prevent musicians and members of the audience from hearing the guitar as
intended...



=== Other ===
Note: The following documents discuss the Bose® Panaray MA12 Modular Array. The information is of interest as it applies to line arrays and is applicable in that context. Please be aware that the {{L1}} is a portable line array. It is twice the height of the MA12 and has different characteristics than a single MA12. See also [[L1™ and the Panaray® MA12]]

* [http://pro.bose.com/pdf/pro/app_notes/panaray_ma12/an_panaray_ma12.pdf Bose® Panaray® MA12 Modular Line Array: Technical Information and Polar Data]
One uses polar plots to describe the behavior of conventional speakers such as
constant directivity horns or small arrays built up using smaller transducers. Line
arrays produce cylindrical waves in the near field and therefore, the vertical polar
plots change as a function of distance. To describe the vertical radiation of a line
array an industry accepted method is to use validated modeling programs and paint a
picture of the radiation as a function of distance. This paper addresses the radiation
characteristics of the MA12 and in addition shows measured polar plots, on-axis
frequency response, controller curves, and impedance curves.

* [http://pro.bose.com/pdf/pro/technical_papers/tp_panaray_ma12.pdf Bose® MA12 Modular Array: Technical Foundation & Discussion] Morten Jørgensen and Kenneth Jacob, Bose® Professional Systems Division
Summary:
THE Bose MA12™ modular array takes advantage of the properties of cylindrical
waves to meet customer requirements that until now could only be met with
loudspeakers flown and aimed in more elaborate and expensive designs. With only
two dimensions of dispersion rather than the three of the more common spherical
waves, the sound from cylindrical waves diminishes much more gradually with
distance from the source. As a consequence, listeners experience relatively little
change in sound level from far away from the MA12 to literally right next to it. The
same gradual change in sound with distance makes the MA12 less susceptible to
feedback from microphones in close proximity. The radiation pattern of the MA12 is
wedge-shaped: wide from side-to-side but sharply confined to the top and bottom of
the array. The vertical radiation virtually shuts off above and below the speaker. As a
result, much less reverberation is generated because almost no sound is radiated
upwards to distant surfaces in the upper part of the room. The result is noticeably
better clarity and intelligibility. The ultra-thin shape of the MA12 means it is easy to
hide; it may be the most unobtrusive speaker yet developed given its exceptionally
high output and full, balanced frequency response. The fact that the MA12 is placed
at ear level (so that listeners are confined within its wedge-shaped radiation pattern)
means that it can usually be installed for a fraction [http://www.ghostpapers.com/term-papers-site/term-papers-for-sale.html term paper for sale]
of the cost of more elaborate
‘flown’ loudspeakers and loudspeaker clusters. Finally, it can be matched to a low
frequency enclosure (Bose Panaray MB4) when extended bass performance is
needed. Taken together, these features and advantages result in a product that
represents an important new tool for satisfying the most basic and important customer
requirements in a wide range of common applications.

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[[Category:Reference]]
[[Category: MA12]]

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