| 发明名称 | Microphone device | ||
| 摘要 | A microphone device includes: a housing having an opening section in an upper face thereof; and a non-directional microphone unit incorporated in the housing and provided inside the opening section. The upper face of the housing has a shape in which a distance from an edge defined as a boundary between the upper face and a side face or a bottom face to the opening section throughout a whole circumference of the upper face changes in ½ or more of the whole circumference of the edge and an average value of the distance from the edge to the opening section is shorter than ½ of a wavelength of a sound wave in a frequency range in which an auditory sensitivity of humans is low. | ||
| 申请公布号 | US9407983(B2) | 申请公布日期 | 2016.08.02 |
| 申请号 | US201314379938 | 申请日期 | 2013.02.14 |
| 申请人 | Yamaha Corporation | 发明人 | Kumagai Kunihiro;Shiozawa Yasuo;Esaki Shuichi;Onitsuka Hirofumi;Goto Kiyohiko;Tsutsui Yoshiaki |
| 分类号 | H04R1/22;H04R1/02;H04R1/08;H04R29/00 | 主分类号 | H04R1/22 |
| 代理机构 | Crowell & Moring LLP | 代理人 | Crowell & Moring LLP |
| 主权项 | 1. A microphone device comprising: a housing having an opening section in an upper face thereof and having a polygonal planar shape; and a non-directional microphone unit incorporated in the housing and provided inside the opening section, wherein the housing includes the upper face, a side face and a bottom face, an edge is defined as a boundary between the upper face, and the side face or the bottom face, the opening section is located at a center of a circumscribed circle of a planar shape of the upper face, and the upper face of the housing has a shape in which an average value of a distance from the edge to the microphone unit throughout a whole circumference of the upper face is shorter than ½ of a wavelength of a sound wave of 10 kHz and in which a ratio of a longest distance to a shortest distance, from the edge to the microphone unit, is two or more in each side of the polygonal shape. | ||
| 地址 | Hamamatsu-shi JP | ||