Effects of Binaural Beats and Spatialized Music on Behavioural and Psychological Symptoms of Dementia in Assisted Living Facility Residents

A personlized music playlist is generated by an audio workstation based on text prompts describing prominent musical features for a chosen favourite genre and style. For each entry in the music playlist, acoustic features are extracted from the audio waveforms and higher-level perceptual features are derived that correlate with human emotional and physiological responses to music. A music playlist with a total duration of ±20 minutes is generated for each individual session based on the derived higher-level perceptual features. The selection and slope of a music playlist is adjusted for the time of day by considering the progression of extracted audio features, i.e., an upward slope to increase arousal for morning sessions (AM) and a downward slope to induce a calming effect for afternoon sessions (PM). PML sessions are administered using wireless noise-cancelling headphones and take place in a quiet room with comfortable seating for groups of up to 10 subjects at a time.

BBM is the combination of pure tones with a variable carrier frequency embedded in the music playlist recordings. The carrier frequency is adaptive to the music it is combined with. A fixed 10 Hz difference between the carrier frequencies of the left and right headphone channels produces a perceived binaural beat frequency corresponding to an alpha brain-wave pattern associated with relaxation.

SM is the presentation of the music playlist such that vocal and instrumental stems are perceived as reverberating within a virtual space from different angles and positions relative to the subject. The music recordings are modified and rendered as a spatialized version using acoustic simulation software.