TH38772A - Audio equipment - Google Patents

Abstract

DC60 (18/06/42) One purpose of this invention is an acoustic device (e.g., a loudspeaker) consisting of a resonant multi-waveform acoustic panel with opposite sides. A vibration actuator is positioned to supply propagating wave vibrations to the resonant panel in order to produce sound energy. A portion is defined as an enclosed void on one side of the panel, which is positioned to contain the sound radiation from that portion of the panel, thus modifying the waveform behavior of the panel. Another purpose of this invention is a process for modifying the waveform behavior of a resonant panel acoustic device by placing the resonant panel near a boundary surface to create a resonant void between the panel and that surface. One purpose of this invention is an acoustic device (e.g., a loudspeaker) consisting of a resonant multi-waveform acoustic panel with opposite sides. A vibration actuator is positioned to supply propagating wave vibrations to the panel. A resonant panel, designed to produce sound energy, has a function of defining an enclosed space, at least a portion of one side of the panel, which is positioned to contain the sound radiation from that portion of the panel. This space modifies the waveform behavior of the panel. Another purpose of this invention is to provide a process for modifying the waveform behavior of a resonant panel acoustic device. This process involves placing the resonant panel near a boundary surface to create a resonant space between the panel and that surface.

Claims (11)

1. An acoustic device consisting of a resonant panel with multiple waveform patterns in a resonance mode on opposite surfaces. A gap definer encloses at least a portion of one panel surface and is arranged to contain the sound wave radiation from that portion. The size of this gap is such that it modifies the waveform behavior of the panel. 2. The audio device claimed under claim 1, where the gap size is such that it causes modification of the waveform behavior of the panel. 3. Audio equipment claimed under claim number 2, where the gap is shallow. 4. The acoustic device claimed under claim 3, where the gap is shallow enough to cause the back surface of the gap to come into contact with one of the panel surfaces mentioned above, resulting in fluid coupling with the panel. 5. The audio device claimed under claim number 4, where the X and Y cross-sectional waveforms are dominant. 6. Audio equipment for which a claim is made under any of the previously mentioned claims, where such gap is sealed. 7. Audio devices for which any of the previously mentioned claims are claimed, where the ratio of void volume to panel area (milliliters per square centimeter) is in the range of 10:1 to 0.2:1. 8. Audio equipment for which one of the previously mentioned claims is claimed, where the panel is installed and sealed within the space defined by the perimeter of the surface. 9. Audio equipment claimed under claim number 8, the scope of which will be flexible. 10. A loudspeaker consisting of an audio device that is the subject to one or more of the preceding claims, and fitted with a vibration trigger to transmit vibration waves that propagate to a resonant panel, thereby producing an audio signal. 11. A method for increasing the number of waveform behaviors of resonant panel audio devices is employed by placing the resonant panel close to the edge surface to define the resonant gap between the two surfaces (Clause 11, page 1, figure 28).