Effects of Binaural Beat Music on Elderly Sleep

Inclusion Criteria: * Inclusion criteria were participants who: were aged 65 years and older, had a PSQI score\> 7, were able to understand questionnaire contents and communicate in Mandarin or Taiwanese Hokkien, stayed in institution for 1 month and more, and did not receive antidepressant within 3 months prior to and during the intervention. Exclusion Criteria: * Exclusion criteria were those with hearing loss, history of bipolar disorder or schizophrenia diagnosed by a physician, and had an acute physiological disease, such as cold, fracture, or trauma.