Abstract: An earphone/headphone device, and a housing for such device are presented. The housing has proximal and distal ends defining respectively, a proximal closed-end portion and a distal open-end portion of the device, and comprises a sound source site for mounting a sound source in this site inside the housing, and an acoustic cavity extending from a back side of the sound source site and the proximal end portion of the housing. The acoustic cavity is configured to define a perpetual self-feeding closed-loop structure for propagation of backwave sound originated at the sound source site, such that the backwave sound is trapped and circulates in the closed-loop structure.

Abstract: An enclosure unit for a speaker device is presented. The enclosure unit comprises an integral elongated hollow body defining a cavity for mounting therein an electronic unit of the speaker. The hollow body has a distal end portion, defining an open end of the enclosure unit through which sound reproduced by said electronic unit is output, a proximal end portion having an open end, and an intermediate portion in between the distal end and proximal end portions. The proximal end portion of the hollow body is coupled to the intermediate portion at a certain location on the intermediate portion thereby defining a toroidal-like portion of the hollow body. A cross sectional dimension of an interior of the hollow body reduces from the distal end portion towards the proximal end portion.

Abstract: An earphone/headphone device, and a housing for such device are presented. The housing has proximal and distal ends defining respectively, a proximal closed-end portion and a distal open-end portion of the device, and comprises a sound source site for mounting a sound source in this site inside the housing, and an acoustic cavity extending from a back side of the sound source site and the proximal end portion of the housing. The acoustic cavity is configured to define a perpetual self-feeding closed-loop structure for propagation of backwave sound originated at the sound source site, such that the backwave sound is trapped and circulates in the closed-loop structure.

Abstract: An enclosure unit for a speaker device is presented. The enclosure unit comprises an integral elongated hollow body defining a cavity for mounting therein an electronic unit of the speaker. The hollow body has a distal end portion, defining an open end of the enclosure unit through which sound reproduced by said electronic unit is output, a proximal end portion having an open end, and an intermediate portion in between the distal end and proximal end portions. The proximal end portion of the hollow body is coupled to the intermediate portion at a certain location on the intermediate portion thereby defining a toroidal-like portion of the hollow body. A cross sectional dimension of an interior of the hollow body reduces from the distal end portion towards the proximal end portion.