Technical Reports | Talk Shop
With John | Research & Development | Q&A
The Sound Lab is Meyer Sound's technology base on the Web. Here you'll
have access to articles and papers that help explain the technology,
research
and design issues surrounding sound reinforcement and reproduction. In
the Talk Shop with John section, John Meyer offers his view of the company's
products and aspects of its goals and direction. The Research & Development
section delves into Meyer Sound's proprietary components, design elements
and techniques. Q&A provides important data about Meyer's technology
and processes.
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TECHNICAL REPORTS
Whether debunking or verifying new and long-held theories, the
following reports promote a higher degree of understanding and awareness
of the business of sound reproduction.
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| Making Sense of Amplifier Power Ratings
This paper will try to bring some clear and solid information into the discussion in the hopes that users may gain a better understanding of power amplifiers, making them better able to evaluate products. Perhaps the most common term in need of examination is “peak watts,” a popular way of expressing amplifier power. |
| The
Design and Performance of the REM Ribbon Emulation Manifold Waveguide
On December 30, 2003, Meyer Sound was awarded a patent for the REM
ribbon emulation manifold waveguide, an innovative design at the
heart of Meyer Sound's line array and curvilinear array loudspeakers.
The REM waveguide’s main advantages over other designs - lower
distortion and tighter pattern control - are achieved due to its
short length and exponentially increasing waveguide channels. |
| Cavities between MILO 120 Loudspeakers and the Effect of the MILO 120-I Insert on Acoustical Response
This research is a continuation of our exploration into the effects of the trapezoidal “cavity” (“Do Cavities Between Arrayed Loudspeakers Affect Frequency Response?”) created when trapezoidal (and rectangular) loudspeakers are splayed at large angles. We revisit those original experiments using improved computational tools and take a look at the cavity between MILO 120 high-power expanded coverage curvilinear array loudspeakers and the results of using the MILO 120-I insert to fill the void. |
User-Defined Equalization Curves
with the LD-3 Compensating Line Driver
Utilizing multiple-variable atmospheric loss equations and pre-calculated Meyer Sound MAPP Online stored values, the LD-3 compensating line driver deploys digitally-controlled analog filters that combine the wide dynamic range of advanced analog filters with the precise repeatability and computer connectivity of digital control, while exhibiting no latency. |
MAPP
Online Low Frequency Polar Data Acquisition
Below 100 Hz, the data collected in Meyer Sound's anechoic chamber
has not been sufficiently accurate to give good results in MAPP
Online. This paper explains how the use of a technique called Boundary
Elements now allows Meyer sound to simulate the polar response of
our loudspeakers below 100 Hz. |
| Comparison
of the Directional Point Source Model and BEM Model for Arrayed
Loudspeakers (PDF)
There are many approximations to the Acoustic wave equation which
can be evaluated numerically which are more and less accurate at
modeling different acoustical phenomena and which are more or less
computationally expensive. This paper compares the Directional Point
Source model and the Boundary Element Method (BEM) for modeling
arrayed loudspeakers. |
DSP Beam
Steering with Modern Line Arrays
This technical report demonstrates the differences between physically
steering loudspeakers and beam steering loudspeakers and identifies
the main problems: the 11-octave wide range of human hearing, the
near impossibility of steering the sound produced from specialty waveguides,
and the unintuitive back lobes and the cone of sound. |
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Can Line Arrays Form Cylindrical Waves? A Line Array Theory Q&A
The common misconception regarding line arrays is that they enable
sound waves to combine, forming a single "cylindrical wave"
with special propagation characteristics. Under linear acoustic
theory, however, this is impossible. The claim is not science
but a marketing ploy.
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Verification
of MAPP Online's Accuracy
To verify the accuracy of Meyer Sound's MAPP Online, Meyer Sound
research and development personnel used the program to model the
frequency response of an M2D Compact Curvilinear Array loudspeaker
system as measured from a specified physical position in a known
concert hall. The staggerng results are presented in this paper. |
What
Is a Curvilinear Array
Pioneered by Meyer Sound in the early 1980s, curved horizontal arrays
formed with trapezoidal enclosures have been an industry standard
for decades. Recently, the sound reinforcement profession has exhibited
considerable interest in new implementations of the line array concept.
This technical report elaborates on the positive aspects of this
trend. |
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Do Array Cavities
Affect Frequency Response?
Research at Meyer Sound provides information on how loudspeaker
arrays interact and also serves as a "proof of performance"
for MAPP Online, the company's multipurpose acoustical prediction
program.
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Speech Intelligibility
Papers
Speech communication systems are subject to more stringent requirements
than music systems. These pages discuss speech intelligibility in
sound reinforcement - what it is, what affects it and how it is measured.
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TALK
SHOP WITH JOHN
From high-drivers to powered subwoofers, John Meyer takes you inside
the thinking process that drove these projects. |
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RESEARCH,
DEVELOPMENT AND PIONEERING ADVANCES
Meyer Sound's core philosophy is that the goal of any sound reinforcement
system is to please, motivate or direct an audience of any size,
in any environment. To achieve this end, Meyer Sound has created
products or utilized concepts that, in their design or application,
are regarded as outside the norm. |
| Meyer
Sound's Anechoic Chamber
In November 1994, Meyer Sound began the design and construction
of an anechoic chamber — an essential tool that enables the
design of loudspeaker systems that perform precisely as specified
in critical sound reinforcement applications. |
Patents
Gallery
Meyer Sound's list of industry firsts includes trapezoidal cabinets,
dedicated loudspeaker processors, self-powered loudspeakers, source-independent
system measurement, parabolic long-throw transducers, cardiod low-frequency
control and high-resolution measurement. |
Technological
Developments
The company's commitment to research and development has produced
a number of true advances in the approach to sound reinforcement
and reproduction. |
Demystifying
the Amplifier
When Meyer Sound set out to design amplifiers for self-powered loudspeakers,
its engineering staff recognized that high-quality sound was only
the starting point of the overall system requirements. |
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Q&A
Our technical support, engineering, sales and service departments
are often asked to provide more in-depth data about our technology
and processes. Here is a selection of interesting questions.
Responses are edited by John Meyer.
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