For at least 80 years, that standard pitch frequency has been A440 Hz — which defines the A note above middle C, and by extension, all the other notes around it. But this longstanding tuning standard ...

为探究 432 Hz 声音干预与 443 Hz（德国专业管弦乐团音乐会音高）相比，对癌症患者心血管参数和心理结果的影响差异，研究人员开展随机交叉试验。结果显示二者均有益，但 432 Hz 对心血管参数影响更显著。该研究为音乐疗法提供了新依据1211。 在音乐的世界里 ...

From classical to rock, musicians tune their instruments to a common pitch so they can play together harmoniously. For at least 80 years, that standard pitch frequency has been A440 Hz — which defines ...