Vehicle loudspeaker system and vehicle structure comprising such loudspeaker system

A dual loudspeaker system with opposing sound emission and a connecting channel through a vehicle partition panel enhances NVH behavior by doubling noise transmission loss, preserving acoustical performance and efficiency, addressing the challenge of resonance frequency transparency in existing systems.

EP4601319A1Pending Publication Date: 2025-08-13ALPS ALPINE CO LTD
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
EP2024156361
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-02-07
Publication Date
2025-08-13

AI Technical Summary

Technical Problem

Existing vehicle loudspeaker systems face challenges in maintaining good noise vibration harshness (NVH) behavior through openings in vehicle partition panels without compromising acoustical performance and efficiency, particularly around the system resonance frequency.

Method used

A vehicle loudspeaker system comprising two loudspeaker devices, each emitting sound in opposite directions, with a communication channel connecting their back spaces and coupled to a partition panel opening, allowing back sound to be communicated through the panel, effectively increasing noise transmission loss without additional damping measures.

Benefits of technology

Improves NVH behavior by doubling noise transmission loss through the soft parts of the loudspeaker system, maintaining acoustical performance and efficiency, especially around resonance frequencies, without the need for mass-increasing damping measures.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure IMGAF001_ABST
    Figure IMGAF001_ABST
Patent Text Reader

Abstract

A vehicle loudspeaker system (1) comprises a first loudspeaker device (10) with a first driver (11), a first housing (12) and a first diaphragm (13), and which is configured to emit sound from a first side (131) of the first diaphragm (13) to an inner space (IS) of the vehicle, and a second loudspeaker device (20) with a second driver (21), a second housing (22) and a second diaphragm (23), and which is configured to emit sound from a first side (231) of the second diaphragm (23) to an outside space (OS) of the vehicle. A communication channel (30) is coupled to the first and second housing (12, 22) for communicating back sound between the second side (132) of the first diaphragm (13) and the second side (232) of the second diaphragm (23) and comprises a first terminal (31) communicating with the back space (15) of the first loudspeaker device (10) and a second terminal (32) communicating with the back space (25) of the second loudspeaker device (20). The communication channel (30) is adapted to be coupled to or arranged in a through-opening (70) of a partition panel (80) dividing the inner space (IS) from the outside space (OS) of the vehicle. The vehicle loudspeaker system is capable of improving noise vibration harshness (NVH) behavior through a porthole in a vehicle partition panel without or with less decreasing the acoustical performance and / or efficiency of the loudspeaker system as compared to a single "fresh air" speaker system.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Speaker device

    EP2658280A1

  • Speaker apparatus and acoustic system

    US20220103932A1

  • Loudspeaker assembly and system

    WO2011047435A1

  • Bandpass woofer enclosure with multiple acoustic filters

    US20020061114A1

  • Vehicle speaker system

    US20180194298A1