JP4676470B2 - 構内放送システム - Google Patents
構内放送システム Download PDFInfo
- Publication number
- JP4676470B2 JP4676470B2 JP2007240934A JP2007240934A JP4676470B2 JP 4676470 B2 JP4676470 B2 JP 4676470B2 JP 2007240934 A JP2007240934 A JP 2007240934A JP 2007240934 A JP2007240934 A JP 2007240934A JP 4676470 B2 JP4676470 B2 JP 4676470B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- amplifying means
- speakers
- group
- power amplifying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Alarm Systems (AREA)
Description
6 第1群のスピーカ
8 スピーカライン(第1の伝送ライン)
16 0dB電力増幅器(零dB電力増幅手段)
18 第2郡のスピーカ
20 スピーカライン(第2の伝送ライン)
Claims (2)
- オーディオ信号源からのオーディオ信号を電力増幅して出力する電力増幅手段と、この電力増幅手段の出力端子に第1の伝送ラインを介して互いに並列に接続された複数の第1群のスピーカとを、備え、前記電力増幅手段と第1群のスピーカとは、ハイインピーダンス接続され、第1群のスピーカの定格入力電力の和は、前記電力増幅手段の定格出力電力にほぼ等しい構内放送システムにおいて、
第1伝送ラインに接続された、電圧利得が零dBの電力増幅手段と、
この零dBの電力増幅手段に第2伝送ラインを介して互いに並列に接続され、前記零dBの電力増幅手段を介して前記電力増幅手段の出力電圧と等しい出力電圧が供給される複数の第2群のスピーカとを、備え、前記零dBの電力増幅手段と第2群のスピーカとは、ハイインピーダンス接続されている構内放送システム。 - 請求項1記載の構内放送システムにおいて、前記電力増幅手段が出力不能となったとき、前記零dBの電力増幅手段の出力側を第1の伝送ラインに接続し、前記零dBの電力増幅手段の入力側に前記オーディオ信号を供給する構内放送システム。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007240934A JP4676470B2 (ja) | 2007-09-18 | 2007-09-18 | 構内放送システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007240934A JP4676470B2 (ja) | 2007-09-18 | 2007-09-18 | 構内放送システム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009071775A JP2009071775A (ja) | 2009-04-02 |
JP4676470B2 true JP4676470B2 (ja) | 2011-04-27 |
Family
ID=40607542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007240934A Active JP4676470B2 (ja) | 2007-09-18 | 2007-09-18 | 構内放送システム |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4676470B2 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012073938A (ja) * | 2010-09-29 | 2012-04-12 | Nohmi Bosai Ltd | 音響警報システム |
CN103442323B (zh) * | 2013-09-03 | 2016-08-24 | 中铁六局集团有限公司 | 一种带故障检测的播放单元及含有此单元的公共广播*** |
JP6955452B2 (ja) * | 2018-01-26 | 2021-10-27 | Toa株式会社 | 放送音形成装置、及び情報提示システム |
KR101931987B1 (ko) * | 2018-06-01 | 2019-03-20 | 정승우 | 원격음성방송장치 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683157U (ja) * | 1979-11-28 | 1981-07-04 | ||
JPS63300686A (ja) * | 1987-05-30 | 1988-12-07 | Sharp Corp | 平衡二線式通信ケ−ブルによる映像音声制御電力多重化伝送装置 |
JP2000013411A (ja) * | 1998-06-18 | 2000-01-14 | Toa Corp | ディジタル放送装置 |
JP2000101375A (ja) * | 1998-09-18 | 2000-04-07 | Nec Corp | 音声出力調整方法およびその装置 |
JP2004343353A (ja) * | 2003-05-14 | 2004-12-02 | Sony Corp | スピーカ装置及び遠隔制御用スピーカシステム並びに増幅装置 |
JP2006211028A (ja) * | 2005-01-25 | 2006-08-10 | Aiphone Co Ltd | バス接続式インターホン装置 |
-
2007
- 2007-09-18 JP JP2007240934A patent/JP4676470B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683157U (ja) * | 1979-11-28 | 1981-07-04 | ||
JPS63300686A (ja) * | 1987-05-30 | 1988-12-07 | Sharp Corp | 平衡二線式通信ケ−ブルによる映像音声制御電力多重化伝送装置 |
JP2000013411A (ja) * | 1998-06-18 | 2000-01-14 | Toa Corp | ディジタル放送装置 |
JP2000101375A (ja) * | 1998-09-18 | 2000-04-07 | Nec Corp | 音声出力調整方法およびその装置 |
JP2004343353A (ja) * | 2003-05-14 | 2004-12-02 | Sony Corp | スピーカ装置及び遠隔制御用スピーカシステム並びに増幅装置 |
JP2006211028A (ja) * | 2005-01-25 | 2006-08-10 | Aiphone Co Ltd | バス接続式インターホン装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2009071775A (ja) | 2009-04-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4676470B2 (ja) | 構内放送システム | |
JP4481158B2 (ja) | 光端末装置 | |
US20080170713A1 (en) | Audio Broadcast System For Elevator | |
KR101965825B1 (ko) | 스피커 자가 진단제어 스마트 방송시스템 | |
KR101248181B1 (ko) | 전관방송 시스템용 출력 트랜스 내장형 d클래스 파워앰프 | |
EP2190114B1 (en) | Local broadcasting system | |
JP5000389B2 (ja) | 光放送伝送システム及び光端末装置 | |
KR102245197B1 (ko) | 비상 접점 입력에 의한 방송 절체 기능을 갖는 전관방송 대응형 오디오 믹서 | |
KR101937304B1 (ko) | 진단제어 및 원격운영 스마트 방송시스템 | |
JP4663597B2 (ja) | 非常放送設備用スピーカ特性補正装置 | |
KR102190169B1 (ko) | 지하철 터널내 비상방송 시스템 | |
KR101807461B1 (ko) | 지하철 터널 안내 방송 시스템 | |
KR102030483B1 (ko) | 통합 멀티미디어 비상 방송 시스템 | |
JP2013179516A (ja) | 集合住宅インターホン装置 | |
JP6143923B1 (ja) | 防災無線システム | |
EP2755322B1 (en) | An audio amplifier | |
KR102049457B1 (ko) | 스피커 방송신호 조절 장치 | |
JP2022020417A (ja) | 放送システムおよび放送設備 | |
JP2793852B2 (ja) | 集合住宅用インターホン | |
KR20200045637A (ko) | 경보방송시스템 | |
JP6762682B1 (ja) | 非常時消音システム及び非常時消音子機 | |
KR102679630B1 (ko) | 원격 스피커 제어시스템의 비상방송장치 | |
KR102571860B1 (ko) | 양방향 전력선 통신을 이용한 전관방송 시스템 및 방법 | |
KR101285628B1 (ko) | 하이브리드 이중화 방송장치 및 방송시스템 | |
JP4719723B2 (ja) | スピーカ線搬送通信システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20090824 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101019 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20101217 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110118 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110127 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140204 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4676470 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140204 Year of fee payment: 3 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140204 Year of fee payment: 3 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140204 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |