The invention herein relates to a kind of hidden speaker enclosure structure that is comprised of a sound chamber, a chamber cover, a speaker and a sound tube, of which the speaker is positioned inside the sound chamber and the chamber cover is sealed onto the opening of the sound chamber to enable the speaker to be concealed within the sound chamber. Furthermore, there are more than one insertion holes through the surface of chamber cover for the insertion of sound tubes that serve as the only media interface between the sealed sound chamber and the air outside. Since the speaker is positioned inside a small sealed space, driven under maximum efficiency conditions, the speaker can be matched with sound tubes of different widths and lengths to convey and produce high transmitted frequencies and, furthermore, call filter the original physical audio spectrum of the speaker. As the invention herein can be hidden inside various decorative objects or articles of normal daily use, no additional space occupancy is required to enjoy listening to music.
According to the invention, a bass reproduction device is disclosed, with which the sound emission from the membrane (15) to the listening space (38) is carried out solely by way of a displacement volume (37) and at least one sound guidance conduit (34), whose cross section is smaller than the cross section of the membrane (15). A device of this kind has the advantage that for sound emission, only wall surfaces have to be supplied, which merely have to contain the sound guidance conduit(s) (34). The side of the membrane (15) remote from the displacement volume (37) acts on a closed damping volume (30), which can, however, be changed in its size over a great band width. A particularly favorable bass reproduction is achieved if the length of the respective sound guidance conduit (34).ltoreq..lambda./8 of the desired upper cross-over frequency.
A sound-driving loudspeaker system is achieved with a simple structure and is capable of easily improving acoustic characteristics. The loudspeaker system emits sound by driving a diaphragm panel by an electromechanical acoustic transducer. The loudspeaker system includes a board, the diaphragm panel whose rim is fixedly attached to the board so as to form a space and which has a stiffness lower than that of the board, and the electromechanical acoustic transducer for emitting sound into the space. With this structure, the diaphragm panel is flexed to be vibrated by the sound emitted from the electromechanical acoustic transducer.
A chair equipped the a speaker is provided with a frame that forms the structural skeleton of the chair, and a speaker unit that is installed to the frame; and wherein hollow pipe is used for the frame, and furthermore wherein the frame functions as an acoustical resonating section or acoustical space for the speaker.
A loudspeaker comprising a loudspeaker drive unit being operable to radiate sound in a forward direction and a rearward direction and an enclosure configured to receive sound radiated in the rearward direction. The enclosure comprises a passageway system comprising a plurality of parts of different lengths. Each of the different length parts has an opening, whereby rearward radiated sound induces standing wave resonances of air in the different length parts at different fundamental frequencies.
A sound transmission assembly and illumination system for a tub, spa, pool, bath, or shower includes an electronic audio speaker or sound wave-guide. When the sound wave-guide is used, a source of sound waves, a sound wave distributor, and one or more sound wave guides transmit the sound waves to one or more speaker-like orifices in the spa housing or head rest. The wave guides are typically conduits through which sound waves can be transmitted. The orifices typically include some form of perforated cover and may include means for providing sound attenuation. In one embodiment, the sound waves are transmitted to two speaker-like orifices in a head rest such that a stereo sound system is provided for the bather. The head rest may include one or more light-transferring resilient inserts and a light source which illuminates the inserts, for example, a LED-type light source. Also, the speakers, insert, and light source may be incorporated into a single assembly adapted for mounting beneath a head rest of a spa. The disclosed invention provides for the capability to provide an audio capability to a spa that has little or no impact upon the fabrication, storage, or shipping of the spa and can be easily retro-fit into existing spas compared to what is provided by the prior art.
