Auditory perspective — Loud speakers and microphones

Wente, E. C.; Thuras, A. L.

doi:10.1109/ee.1934.6540358

Cited by 5 publications

(2 citation statements)

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“…Multicellular Horn. In the early days (Wente and Thuras, 1934), groups of aponential cells, each about 15 degrees wide, were clustered together to de ne a speci c solid radiation angle. This produced excellent results at mid-frequencies, but there was pronounced " ngering" of the response along the cell boundaries at higher frequencies.…”

Section: The Role Of Secondary Resonancesmentioning

confidence: 99%

Direct Radiators Versus Horn Loading: Design Principles and Historical Perspective in Sound Reinforcement

GANDER,

EARGLE

2024

Reproduced Sound 1996

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Section: The Role Of Secondary Resonancesmentioning

confidence: 99%

Direct Radiators Versus Horn Loading: Design Principles and Historical Perspective in Sound Reinforcement

GANDER,

EARGLE

2024

Reproduced Sound 1996

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“…Where an efficient horn system with a large wavefront curvature is required, it is therefore necessary to break the wavefront into manageable sections, as in the multicellular horn. 6 The purpose of this paper is to show how this dilemma, which lies at the center of ideal horn theory, can be resolved by suitably modifying the properties of the medium. First an exact one-parameter solution of the wave equation is selected, using one of the coordinate systems which allows separation of the variables.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Horns with Spatially Varying Density or Elasticity

Shaw

1971

The Journal of the Acoustical Society of America

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The transformation of acoustic impedance can be accomplished either by a controlled variation of wavefront area as the wave progresses, or by transmission of the waves through a medium in which there is a gradient of density or elasticity. The second concept does not seem to have been exploited despite the fact that the effective density of a fluid medium can be increased by introducing suitable arrays of obstacles, and the bulk modulus of a liquid decreased by compliant inclusions. The present analysis shows that for plane waves a medium in which density varies as (B + mx)−2 or elastic modulus as (B − mx)2, where x is distance and B and m are constants, is analogous to the familiar exponential horn. Simple analytical solutions are also found for radial variations of density or elasticity which transform the behavior of sectoral and conical horns into the acoustic equivalents of exponential horns. Since the wave equation is separable in both cylindrical and spherical coordinates, these solutions are exact. Three examples of artificial fluid structure are given and the relationships between array size, bandwidth, and damping are discussed.

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Multichannel transmission of music from concert hall to home

Thomas¹,

Ashley

ICASSP '77. IEEE International Conference on Acoustics, Speech, and Signal Processing

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The basis for 2 or more channel transmission of music from a concert ball to a home living room is explored. Six assumptions are given. The 1933 "Syinposium on Auditory Perspective" is reviewed to indicate the difference between a concert hall and a living room as a playback space. A 2-channel system is found optimum for directional effects. Transmission of the reverberant field could use an additional channel but can be done adequately and cost effectively with a 2-channel system. We conclude there is little justification for the use of more than 2-channels to transmit concert ball music.

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Auditory perspective — Loud speakers and microphones

Cited by 5 publications

References 0 publications

Direct Radiators Versus Horn Loading: Design Principles and Historical Perspective in Sound Reinforcement

Direct Radiators Versus Horn Loading: Design Principles and Historical Perspective in Sound Reinforcement

Acoustic Horns with Spatially Varying Density or Elasticity

Multichannel transmission of music from concert hall to home

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