Blood oxygen levels and acoustiscs (IMAGE) Acoustical Society of America Caption Researchers have developed microbubbles to acoustically detect blood oxygen levels Credit Shashank Sirsi Usage Restrictions Journalists may use this image only with appropriate credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.