Title:
戸別受信機及び緊急通報方法
Document Type and Number:
Japanese Patent JP7196623
Kind Code:
B2
Abstract:
To provide a house-to-house receiver capable of facilitating hearing of an emergency call indoor by doubly reducing the volume of noise invading into indoor from outdoor.SOLUTION: A house-to-house receiver 1 includes: an antenna 10 for receiving a radio wave of an emergency call from a master station; a speaker 20 for outputting an emergency call to indoor as voice; a contact type microphone 30 installed outward on the indoor side of a window and inputting sound invading from the window; a vibration speaker 40 installed outward on the indoor side of a window and outputting sound of reverse characteristics of sound input by the contact type microphone 30; an error sound collection microphone 50 inputting sound invading from the window after the vibration speaker 40 suppresses; and a main body part 60 which converts a radio wave into sound, generates sound of reverse characteristics on the basis of the sound input by the contact type speaker 30, feed-forward-controls a pronunciation of the vibration speaker 40 using the sound input by the error sound collection microphone 50 and feedback-controls the pronunciation of the speaker 20.SELECTED DRAWING: Figure 1
Inventors:
Yasuhide Higaki
Application Number:
JP2019005702A
Publication Date:
December 27, 2022
Filing Date:
January 17, 2019
Export Citation:
Assignee:
NEC
International Classes:
G08B27/00; G10K11/178
Domestic Patent References:
| JP2018170018A | ||||
| JP201836327A | ||||
| JP2001296874A |
Foreign References:
| WO2011118218A1 |
Attorney, Agent or Firm:
Ken Ieiri