JP-7855413-B2 - Acoustic signal output device

JP7855413B2JP 7855413 B2JP7855413 B2JP 7855413B2JP-7855413-B2

Inventors

加古達也
千葉大将
岩瀬潤
佐藤広明
小林和則

Assignees

ＮＴＴ株式会社
ＮＴＴソノリティ株式会社

Dates

Publication Date: 20260508
Application Date: 20220614

Claims (4)

The structure includes one or more first sound holes for emitting a first acoustic signal to the outside, a hollow section for emitting a second acoustic signal into an internal space, and one or more second sound holes for emitting the second acoustic signal emitted into the internal space of the hollow section to the outside. The hollow section is designed to have a resonant frequency of 6 kHz or higher, and the second acoustic signal, in which frequency band components including 6 kHz are suppressed, is emitted to the outside from the second sound hole. The structural part includes an internal hollow part arranged in the internal space of the hollow part, An acoustic signal output device in which the internal space of the internal hollow portion is spatially separated from the internal space of the hollow portion located outside the internal hollow portion.
An acoustic signal output device according to claim 1, The device further comprises an electronic component for driving a driver unit that emits at least one of the first acoustic signal and the second acoustic signal. An acoustic signal output device in which at least a portion of the electronic component is housed in the internal space of the internal hollow portion.
An acoustic signal output device according to claim 1, The present invention further comprises a cushioning material disposed between the outer side of the internal hollow portion and the inner side of the hollow portion, An acoustic signal output device, the outer side of the internal hollow portion being fixed to the inner side of the hollow portion via the cushioning material.
An acoustic signal output device, The structure includes one or more first sound holes for emitting a first acoustic signal to the outside, a hollow section for emitting a second acoustic signal into an internal space, and one or more second sound holes for emitting the second acoustic signal emitted into the internal space of the hollow section to the outside. The hollow section is designed to have a resonant frequency of 6 kHz or higher, and the second acoustic signal, in which frequency band components including 6 kHz are suppressed, is emitted to the outside from the second sound hole. When the acoustic signal output device is fitted to the user, the first sound hole is positioned in a first direction, and the second sound hole is positioned in a second direction different from the first direction, with the first direction being the side of the user's ear canal. The structural part includes an internal hollow part arranged in the internal space of the hollow part, An acoustic signal output device in which the internal space of the internal hollow portion is spatially separated from the internal space of the hollow portion located outside the internal hollow portion.

Description

This invention relates to an acoustic signal output device, and more particularly to an acoustic signal output device that does not seal the ear canal. In recent years, the increased strain on the ears caused by wearing earphones and headphones has become a problem. Open-ear earphones and headphones, which do not block the ear canal, are known as devices that reduce ear strain. “WHAT ARE OPEN-EAR HEADPHONES?”, [online], Bose Corporation, [Accessed May 16, 2022], Internet <https://www.bose.com/en_us/better_with_bose/open-ear-headphones.html> Figure 1 is a perspective view illustrating the configuration of an acoustic signal output device according to an embodiment.Figure 2A is a transparent plan view illustrating the configuration of the acoustic signal output device according to the embodiment. Figure 2B is a transparent front view illustrating the configuration of the acoustic signal output device according to the embodiment.Figure 3A is an end view of the 2BA-2BA section of Figure 2B. Figure 3B is an end view of the 2A-2A section of Figure 2A.Figures 4A and 4B are conceptual diagrams illustrating the arrangement of tone holes.Figure 5 is a diagram illustrating the usage state of the acoustic signal output device according to the embodiment.Figure 6A is a diagram illustrating the usage state of the acoustic signal output device of the embodiment. Figure 6B is a diagram illustrating the observation conditions of the acoustic signal emitted from the acoustic signal output device of the embodiment.Figure 7 is a diagram illustrating how the acoustic signal output device of the embodiment is placed on a flat surface.Figure 8A is a front view illustrating the arrangement of the tone holes. Figures 8B and 8C are front views illustrating the arrangement of the tone holes.Figures 9A and 9B are conceptual diagrams illustrating the arrangement of tone holes.Figures 10A and 10B are conceptual diagrams illustrating the arrangement of tone holes.Figure 11A is an end view of the 2BA-2BA section of Figure 2B. Figure 11B is an end view of the 2A-2A section of Figure 2A.Figure 12A is an end view of Figure 2B taken along the line 2BA-2BA. Figure 12B is a conceptual diagram illustrating the drive system of an acoustic signal output device according to an embodiment.Figure 13 is a graph illustrating equal-loudness contours (ISO 226:2003 Acoustics - Normal equal-loudness-level contours).Figure 14A is a graph illustrating the relationship between the volume of the internal space of the enclosure and the resonant frequency. Figure 14B is a graph illustrating the sound pressure levels when an LPF (Low-pass filter) is used (with LPF) and when an LPF is not used (without LPF).Figure 15 is a diagram illustrating a configuration for attaching the acoustic signal output device of the embodiment to the auricle.Figure 16 illustrates a configuration in which the acoustic signal output device of the embodiment is mounted on the temple of eyeglasses. Figure 16A is a front view of the acoustic signal output device of the embodiment. Figure 16B is a transparent enlargement of Figure 16A. Figure 16C is an enlarged rear view of the acoustic signal output device of the embodiment.Figure 17 is a front view illustrating a modified example of the acoustic signal output device of the embodiment. EmbodimentFigure 18A is a perspective view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 18B is a plan view illustrating a modified example of the acoustic signal output device of the embodiment.Figure 19 is a plan view illustrating a modified example of the acoustic signal output device of the embodiment.Figure 20A is a plan view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 20B is a right side view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 20C is a front view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 20D is a rear view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 20E is a front view illustrating the usage state of the modified acoustic signal output device of the embodiment.Figure 21A is a perspective view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 21B is a perspective view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 21C is a perspective view illustrating the usage state of the modified acoustic signal output device of the embodiment.Figure 22A is a front view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 22B is a rear view illustrating a modified example of the acoustic signal output device of the embodiment.Figure 23A is a front view illustrating a modified example of the acoustic signal output device of the embodiment. Figure 23B is a rear view illustrati