Methods for producing acoustic sources
AssigneeETS-Lindgren, Inc.
InventorDouglas Frank Winker
Life of this patent
Estimating the term…
Abstract
Embodiments include an acoustic source for use in a hemi-anechoic chamber comprising a source assembly and a waveguide assembly for producing sound outside of a measurement hemisphere and channeling the sound into the measurement hemisphere. A waveguide end from which sound emanates is positioned close to the reflecting plane of the chamber and can approximate a point source.
Claims19
A method for producing an acoustic source for use in a sound chamber having a reflecting plane and absorber-lined walls, comprising:
- positioning a source assembly outside a measurement hemisphere;
- coupling the source assembly to a waveguide that carries sound from the source assembly into the measurement hemisphere to emanate sound at a waveguide end;
- and
- positioning the waveguide end from which sound emanates to be close to the reflecting plane and away from the absorber-lined walls of the chamber.
An acoustic source for use in a sound chamber having a reflecting plane and absorber-lined walls, the acoustic source comprising:
- a source assembly positioned outside a measurement hemisphere;
- a waveguide assembly coupled to the source assembly that guides sound from the source assembly into the measurement hemisphere to emanate sound at a waveguide end positionable near the center of the reflecting plane and away from the reflecting plane by an amount less than a wavelength at a highest frequency of interest.
A method for producing an acoustic source for use in a sound chamber having a reflecting plane and absorber-lined walls, comprising:
- positioning a source assembly outside a measurement hemisphere;
- the source assembly comprising a compression driver and adapter almost totally encompassed by sound absorbing material and with an exit aperture for coupling to a waveguide assembly;
- coupling the source assembly to a waveguide assembly that guides sound from the source assembly into the measurement hemisphere to emanate sound at a waveguide end;
- and
- positioning the waveguide end from which sound emanates to be an adjustable distance from the reflecting plane.
Dependencies are inferred from the claim text.