To remove noise such that an alarm sound selectively reaches only a target person waiting for opening of a railroad crossing in an environment where an alarm sound of the railroad crossing and noise of a train are generated.SOLUTION: A noise cancel system 9 includes: a microphone 3 that collects a sound including an alarm sound of a railroad crossing and noise of a train; a generation unit 41 that generates a reverse phase sound of the collected sound; a removal unit 42 that generates a processed sound obtained by removing a reverse phase component of the alarm sound from the reverse phase sound; a first speaker 1 that outputs the processed sound toward a target person waiting for opening of the railroad crossing; and a second speaker 2 that outputs the reverse phase sound toward persons other than the target person.SELECTED DRAWING: Figure 1
【課題】踏切の警報音、及び列車の騒音が発生している環境において、踏切の開放を待つ対象者にだけ選択的に警報音が届くように騒音を除去する。【解決手段】ノイズキャンセルシステム9は、踏切の警報音及び列車の騒音を含む音を収集するマイクロホン3と、収集された音の逆位相音を生成する生成部41と、逆位相音から警報音の逆位相成分を除去した加工音を生成する除去部42と、加工音を踏切の開放を待つ対象者に向けて出力する第1スピーカ1と、逆位相音を対象者以外に向けて出力する第2スピーカ2と、を有する。【選択図】図1
NOISE CANCEL SYSTEM
ノイズキャンセルシステム
10.10.2024
Patent
Elektronische Ressource
Japanisch
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler |
Got a noise problem? Cancel it
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|Europäisches Patentamt | 2019
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