Researchers funded by TRANSFORM Heart Failure (TRANSFORM HF) are investigating whether in-ear microphones found in active noise-canceling earbuds can be used to record the sound of blood flow and measure heart rate remotely, without the need for expensive pressure cuffs. Another team funded by TRANSFORM HF is investigating how to overcome skin-tone bias in pulse oximeters. Many of these devices currently overestimate blood oxygen saturation in patients who have dark skin as compared with patients who have light skin, which could potentially lead to at-risk patients being overlooked.