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Saturday, August 1, 2020 | History

2 edition of Sound radiation from line arrays found in the catalog.

Sound radiation from line arrays

by H. Gordon Akst

  • 331 Want to read
  • 32 Currently reading

Published by Massachusetts Institute of Technology .
Written in English

    Subjects:
  • Naval architecture

  • ID Numbers
    Open LibraryOL25334805M

      VUE Audiotechnik announces the release of their latest technical documentation in form of a white paper for the al-Class, covering the development of line array loudspeakers from the s work of Wolfe, I. and Malter, L. on "Directional Radiation of Sound", through continuous source topology (CST) technology as applied in the Vue al-Class systems.. The paper offers an in-depth view of Vue's. D.A.S. Audio has expanded the successful Event series of line arrays and bass systems with two new powered models, the EventA line array and the EventA subwoofer. The new products are aimed at providing Event Series users with the tools needed to handle an even a wider range of applications. The D.A.S. EventA is a powered, three-way line array which employs two D.A.S.

    In radio and telecommunications a dipole antenna or doublet is the simplest and most widely used class of antenna. The dipole is any one of a class of antennas producing a radiation pattern approximating that of an elementary electric dipole with a radiating structure supporting a line current so energized that the current has only one node at each end. 6. Line Array References and Links: Line Array Technical References: Smith, David L., "Discrete-Element Line Arrays - Their Modeling and Optimization", J. Audio Eng. Soc., vol, no, November. Stanley P. Lipshitz and John Vanderkooy, “The Acoustic Radiation of Line Sources of Finite.

    Sound waves were emitted and the echoes evaluated. Passive applications are used by submarines. Large line arrays for low frequencies are towed. The underwater sound application is described by Urick () [1]. Further applications are used in radioastronomy. Most of the current papers on beamforming are on studies for enhancing wanted sound. This book is a valuable read for EASE power users, system designers and loudspeaker manufacturers. It provides the basis and theoretical background for accurate simulation of complex loudspeakers, steered columns and line arrays. Anybody working with EASE GLL loudspeaker data will benefit from reviewing the concepts discussed here.


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Sound radiation from line arrays by H. Gordon Akst Download PDF EPUB FB2

The "corner-line-array" loudspeaker constitutes an improvement over previous point, line and planar loudspeakers by combining the reflected acoustic images with the direct sound radiation in such a way as to effectively create an infinitely long line source radiator where the side wall and front wall reflections of the line are uniquely located.

Analysis of projector and hydrophone transducer arrays, including the effects of mutual radiation impedance and Sound radiation from line arrays book models for elements and arrays, are also covered. The book includes new advances in transducer design and transducer materials and has been completely reorganized to be suitable for use as a textbook, as well as a reference 5/5(1).

This treatment of radiation covers point, dipole, line, plane and other sources, both with and without baffles, and the propagation of sound in various kinds and shapes of Cited by: Broadside Arrays, (Bob’s Fig.__) in which a number of woofers are arranged in a row, and the primary radiation is at right angles to the row.

This had been the typical sub/array configuration seen most commonly, either spread out in a horizontal row (curve or line) a flown column. Line array speakers have been used in theaters and PA systems for donkey’s years.

There is much to be said for line arrays. One advantage is load sharing. This means drivers share the load so no one driver has to output all of the sound.

The efficiency of radiation of sound from one side of a well-designed direct-radiator loudspeaker was shown in Chapters 6 and 7 Chapter 6 Chapter 7 to be typically less than 1%.

By comparison, the efficiency of radiation from a horn loudspeaker usually lies between 10% and 50%. By considering the nature of the sound radiation from the rail it is found that there are some fundamental problems in measuring it using a microphone array.

Microphone arrays may be arranged in a single line, which may be horizontal to locate sources along the train or vertical to locate their height. An asymmetrical vertical coverage sends more sound toward the far area of a venue, to make front-to back sound levels more consistent.

It outputs less energy above the axis than a standard loudspeaker & less on the walls, resulting in a lower reverberant field and a much higher Direct-to-reverb ratio, providing a higher speech intelligibility. Beam-Stiffened Plates. The plate-like components of many practical structures are not uniform, homogeneous and isotropic like those so far considered.

In order to increase their static stiffness, plates are often stiffened by discrete linear elements (we shall.

Fulcrum Acoustic’s FL line array module uses dual 8″ horn-loaded woofers and 3 1½” compression drivers in a compact enclosure. The enclosure is shaped to accommodate up to 20° of splay between adjacent boxes, allowing for more sharply curved arrays.

The rapid take off of digitally steered line arrays has brought some of the best minds in the business together, to both acoustically conceive of and to steer the devices. This has required loudspeaker designers, DSP engineers/programmers and those versed in abstract mathematics, rather than dBs, to work closely together.

Sound System Engineering Third Edition is a complete revision and expansion of the former n by two leading authorities in the field of audio engineering, this highly respected guide covers the fundamentals necessary for the understanding of today's systems as well as for those systems yet to come.

The space formerly occupied by outdated photographs of manufacturers' 5/5(1). approach of sound-radiation capture and reproduction. In particular, this work illustrates the implementation of surrounding spherical microphone arrays for the capture of sound-radiation, as well as the analysis of sound-radiation with a func-tional model.

Most essential, the thesis shows how to obtain holophonic reproduc-tion of sound-radiation. International Space Station Activity Book >>> For more information, check out the web sites on page 30!.

Epique CBT24 Line Array Loudspeaker Review p2 By James Larson — Ap The CBT24 speakers were tested on the ground since their emulated source point of acoustic radiation lay on the floor surface of their intended use. Sound radiation from spherical loudspeaker arrays This section describes a mathematical model of the vibroacoustic behavior of spherical loud- speaker arrays under free-field conditions.

The second edition of Loudspeaker Handbook follows the same general outlines as the highly successful first edition and has been augmented and updated in many areas of technology. Most notable are the developments in large-scale, programmable line arrays, distributed mode loudspeakers, and ultrasonic-based audio transduction.

Additionally, the core chapters on low frequency systems. Her book has valuable information on FCC safety guidelines, legal aspects of the Telecommunications Act, cell tower sitings and case law. She also co-authored Biological effects from exposure to electromagnetic radiation emitted by cell tower base stations and other antenna arrays.

() Environmental Reviews,18(NA): Chapter 7: Projector Arrays. Array Directivity Functions. Mutual Radiation Impedance and the Array Equations. Calculation of Mutual Radiation Impedance. Arrays of Non-FVD Transducers. Volume Arrays. Near Field of Projector Array. [4] R.F. Ndangali and S.V. Shabanov, ”Electromagnetic bound states in the radiation continuum for periodic double arrays of subwa velength dielectric cylinders”, J.

Math. Phys. 51. TC COMMUNICATIONS-ELECTRONICS FUNDAMENTALS Wave Propagation, Transmission Lines, and Antennas JULY DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited. HEADQUARTERS.systems Sound Reinforcement System design, Line array: 1.

Line array as an integration from the multy way system concept and multiple source directivity control. 2. Equalization, total gain of the system, audio chain. Line array system example. Speaker Lab software is used to re-design the Array from the acoustic.Sound and Structural Vibration, Second Edition: Radiation, Transmission and Response Frank J.

Fahy, Paolo Gardonio The first edition of Sound and Structural Vibration was written in the early s.