Nicoventures Trading Limited

Martin Audio Limited

William T Webb

Kang Min Kim

Jared Aller

Vic Pramono

Christina Tapp

Cale Kaufman

Jason D Baird

Oliver Wright

Paul Darlington

Aerosol generator

Loudspeaker unit

A directional loudspeaker unit for reproducing mid-range audio frequencies, comprising a cone loudspeaker and, disposed forwardly of the surface of the cone of the loudspeaker, a phase plug and a horn, wherein the phase plug and preferably also the horn are arranged co-axially on the axis of the cone, and wherein the phase plug has a central aperture. Preferably the horn has a diffraction slot defined by lateral walls which converge from the entrance (throat) of the horn.

Directional loudspeaker unit

A horn loudspeaker comprises: a horn ( ) having a throat ( ) and a mouth ( ); a primary electro-acoustic driver ( ) mounted at or adjacent the throat of the horn and directed generally along the horn; and at least one secondary electro-acoustic driver ( T, B, L, R) mounted part-way along the horn and directed generally across the horn. The secondary driver(s) can be used to change the local impedance conditions in the horn and therefore to change the polar response of the horn loudspeaker. At least one filter ( A, E) is provided for filtering an input signal ( ) for the primary driver to produce a filtered signal for the primary driver or each of the secondary drivers. Such a filter may be chosen or designed so as to optimize some aspect of the polar response of the horn loudspeaker, for example to increase directivity, or flatten the polar response within a specified included radiation angle, or to increase omnidirectionality.

Horn loudspeaker and loudspeaker systems

Growing community of inventors

London, United Kingdom

William T Webb