JP-7856198-B2 - Acoustic signal output device
Inventors
- 千葉 大将
- 加古 達也
- 小林 和則
Assignees
- ＮＴＴ株式会社
Dates
- Publication Date
- 20260511
- Application Date
- 20250526
Claims (2)
- An acoustic signal output device, Multiple driver units, One or more first sound holes for leading out a first sound signal emitted from any of the driver units to the outside, and one or more second sound holes for leading out a second sound signal emitted from any of the driver units to the outside, It has one or more third sound holes for leading out a third acoustic signal emitted from any of the driver units to the outside, and one or more fourth sound holes for leading out a fourth acoustic signal emitted from any of the driver units to the outside, The first tone hole is open facing the first direction, The second tone hole is open facing a second direction between the first direction and the direction opposite to the first direction. The fourth tone hole is open facing the same or approximate fourth direction as the first direction. The acoustic signal output device wherein the third sound hole is open facing a third direction between the fourth direction and the direction opposite to the fourth direction.
- The first tone hole and the second tone hole are located in the first housing. The third and fourth tone holes are installed in the second housing. The acoustic signal output device according to claim 1.
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 September 13, 2021], Internet <https://www.bose.com/en_us/better_with_bose/open-ear-headphones.html> Figure 1 is a transparent perspective view illustrating the configuration of the acoustic signal output device according to the first embodiment.Figure 2A is a transparent plan view illustrating the configuration of the acoustic signal output device according to the first embodiment. Figure 2B is a transparent front view illustrating the configuration of the acoustic signal output device according to the first embodiment. Figure 2C is a bottom view illustrating the configuration of the acoustic signal output device according to the first embodiment.Figure 3A is an end view of 2BA-2BA in Figure 2B. Figure 3B is an end view of 2A-2A in Figure 2A. Figure 3C is an end view of 2BC-2BC in Figure 2B.Figure 4 is a conceptual diagram illustrating the arrangement of tone holes.Figure 5A is a diagram illustrating the usage state of the acoustic signal output device of the first embodiment. Figure 5B is a diagram illustrating the observation conditions of the acoustic signal emitted from the acoustic signal output device of the first embodiment.Figure 6 is a graph illustrating the frequency characteristics of the acoustic signal observed at position P1 in Figure 5B.Figure 7 is a graph illustrating the frequency characteristics of the acoustic signal observed at position P2 in Figure 5B.Figure 8 is a graph illustrating the difference between the acoustic signal observed at position P1 and the acoustic signal observed at position P2.Figures 9A and 9B are graphs illustrating the relationship between the area ratio of sound holes and sound leakage.Figure 10A is a front view illustrating the arrangement of the tone holes. Figure 10B is a conceptual diagram illustrating the arrangement of the tone holes.Figure 11A is a front view illustrating the arrangement of the tone holes. Figure 11B is a conceptual diagram illustrating the arrangement of the tone holes.Figures 12A to 12C are front views illustrating modified arrangements of the tone holes.Figures 13A and 13B are transparent plan views illustrating variations in the arrangement of the tone holes.Figures 14A and 14B are conceptual diagrams illustrating modified arrangements of tone holes.Figure 15A is a transparent front view illustrating a modified arrangement of the sound holes. Figure 15B is an end view illustrating a modified arrangement of the sound holes and a modified distance between the driver unit and the housing.Figures 16A to 16C are end views illustrating modified examples of the acoustic signal output device of the first embodiment.Figure 17 is a graph comparing the frequency characteristics of the acoustic signals observed at position P1 in Figure 5B.Figure 18 is a graph illustrating the frequency characteristics of the acoustic signal observed at position P2 in Figure 5B.Figure 19 is a graph illustrating the difference between the acoustic signal observed at position P1 and the acoustic signal observed at position P2.Figure 20 is a transparent perspective view illustrating the configuration of the acoustic signal output device according to the second embodiment.Figure 21A is a transparent plan view illustrating the configuration of the acoustic signal output device according to the second embodiment. Figure 21B is a transparent front view illustrating the configuration of the acoustic signal output device according to the first embodiment. Figure 21C is a bottom view illustrating the configuration of the acoustic signal output device according to the first embodiment.Figure 22A is an end view of the 21A-21A section of Figure 21B. Figure 22B is a cross-sectional view of the 21B-21B section of Figure 21A.Figures 23A and 23B illustrate the usage state of the acoustic signal output device according to the second embodiment.Figure 24 is a transparent perspective view illustrating a modified example of the acoustic signal output device of the second embodiment.Figure 25A is a transparent plan view illustrating a modified example of the acoustic signal output device of the second embodiment. Figure 25B is a transparent front view illustrating a modified example of the acoustic signal output device of the second embodiment. Figure 25C is a bottom view illustrating a modified example of the acoustic signal output device of the second embodiment.Figure 26 is an end view of the 25A-25A section of Figure 25B.Figure 27 is a perspective view illustrating the configuration of the acoustic signal output device according to the th