BLOW-OUT PIPE FOR LOUDSPEAKER Russian patent published in 2020 - IPC H04R1/28 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics, in particular to loudspeakers having a phase inverter. Loud-speaker bass reflex tube comprises a tubular portion extending in an axial direction and thereby forming a radial inner surface, an axial front portion and an axial rear portion, in which the tubular part has an inner wall of the pipe and an outer wall of the pipe, in which the inner wall of the pipe and the outer wall of the pipe at least partially extend in the axial direction, wherein the phase inverter pipe is at least partially made of a ceramic material, in which at least the inner wall of the pipe and the inner surface are made from ceramic material.

EFFECT: technical result is the improvement of sound quality.

19 cl, 5 dwg