A study of sound source position estimation and noise suppression in body-transmitted sound using microphone array

2023 Fiscal Year Final Research Report

• Project/Area Number: 18K11377
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 61010:Perceptual information processing-related
• Research Institution: Oita University
• Principal Investigator: Nishijima Keisuke 大分大学, 理工学部, 助教 (30237698)
• Co-Investigator(Kenkyū-buntansha): 古家 賢一 大分大学, 理工学部, 教授 (10643611)
• Project Period (FY): 2018-04-01 – 2024-03-31
• Keywords: シャント音 / マイクロホンアレイ / 狭窄位置

Outline of Final Research Achievements

In this study, we aimed to estimate the location of stenosis from auscultatory sounds at multiple positions using a microphone array, and to correctly determine whether the blood vessel is normal or stenotic using the auscultatory sounds at the estimated positions. To this end, we defined features for estimating the location of stenosis in blood vessels. We also proposed a method to estimate the location of stenosis using shunt sounds measured at multiple positions. As a result, we demonstrated that the location of stenosis (and its vicinity) can be estimated, and demonstrated the usefulness of discrimination at the location of stenosis.

Free Research Field

音メディア処理

Academic Significance and Societal Importance of the Research Achievements

血液透析患者の多くは静脈と動脈を吻合させシャントを形成する。シャントは経時変化等により血管の狭窄を起こすという問題があり，日頃から管理する必要がある。本研究の進展により，患者自身が血管の状態を把握することが容易になれば，早期に狭窄への対応が可能となり，患者の身体的負担や金銭的負担，社会保障費を軽減することが可能となる。