公开(公告)号：US20250119682A1

公开(公告)日：2025-04-10

申请号：US18987519

申请日：2024-12-19

Applicant: ALPS ALPINE CO., LTD.

Inventor： Alan Robert Cross ,  Jay Krusac ,  Erich Zachariah Mellits

IPC: H04R1/28 ,  H04R1/02 ,  H04R1/22

Abstract: Loudspeaker enclosures that support improved acoustic radiation efficiency at low audible frequencies without compromising acoustic radiation efficiency at mid and high audible frequencies. Embodiments include enclosures having a primary chamber and a secondary chamber acoustically coupled to the primary chamber via a passive radiator. The geometrical characteristics of the secondary chamber and the corresponding air plenum are tailored for enhanced efficiency at low frequencies.

公开(公告)号：US12231842B2

公开(公告)日：2025-02-18

申请号：US18059919

申请日：2022-11-29

Applicant: ALPS ALPINE CO., LTD.

Inventor： Alan Robert Cross ,  Jay Krusac ,  Erich Zachariah Mellits

IPC: H04R1/28 ,  H04R1/02 ,  H04R1/22

Abstract: Loudspeaker enclosures that support improved acoustic radiation efficiency at low audible frequencies without compromising acoustic radiation efficiency at mid and high audible frequencies. Embodiments include enclosures having a primary chamber and a secondary chamber acoustically coupled to the primary chamber via a passive radiator. The geometrical characteristics of the secondary chamber and the corresponding air plenum are tailored for enhanced efficiency at low frequencies.

公开(公告)号：US20230232150A1

公开(公告)日：2023-07-20

申请号：US18059919

申请日：2022-11-29

Applicant: ALPS ALPINE CO., LTD.

Inventor： Alan Robert Cross ,  Jay Krusac ,  Erich Zachariah Mellits

IPC: H04R1/28 ,  H04R1/02 ,  H04R1/22

CPC classification number: H04R1/2834 ,  H04R1/025 ,  H04R1/227

Abstract: Loudspeaker enclosures are disclosed that support improved acoustic radiation efficiency at low audible frequencies without compromising acoustic radiation efficiency at mid and high audible frequencies. Embodiments include enclosures having a primary chamber and a secondary chamber acoustically coupled to the primary chamber via a passive radiator. The geometrical characteristics of the secondary chamber and the corresponding air plenum are tailored for enhanced efficiency at low frequencies.