SOUND SPEED CORRECTION DEVICE

• Main Authors: MATSUMOTO HIROYUKI, SAWA HIROTAKA, WATANABE SHUICHI, TSUJI TOSHITSUGU, IZUMI AKITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 04.02.2016
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DEAF-AID SETS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MEASURING; PHYSICS; PUBLIC ADDRESS SYSTEMS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To provide a sound speed correction device capable of preventing deterioration in accuracy of directivity forming by precisely calculating the sound speed by acquiring at least ambient temperature, humidity and air pressure when picking up sounds emitted from a sound source located in a specific direction viewed from a microphone array apparatus.SOLUTION: The sound speed correction device includes: an environmental parameter acquisition section that acquires a measured value of ambient environmental parameter of a sound pick-up unit for picking up sounds emitted from a sound source; and a sound speed correction section that corrects the sound speed of the sound which is used for forming the directivity orientation direction toward the sound source from the sound pick-up unit by using the measured value of ambient environmental parameter of the sound pick-up unit acquired by the environmental parameter acquisition section.SELECTED DRAWING: Figure 1 【課題】マイクアレイ装置から見て特定の方向の音源から発した音声の収音時における周囲の温度、湿度、気圧を少なくとも取得し、正確な音速を算出することで指向性の形成精度の劣化を抑制する。【解決手段】音速補正装置は、音源から発せられた音声を収音する収音部の周囲の環境パラメータの測定値を取得する環境パラメータ取得部と、前記環境パラメータ取得部により取得された前記収音部の周囲の環境パラメータの測定値を用いて、前記収音部から前記音源に向かう指向方向への指向性の形成に用いる前記音声の音速を補正する音速補正部と、を備える。【選択図】図１