Psychoacoustics and Brainwave Entrainment Flashcards

Which listening environment produces the most effective brainwave entrainment from binaural beats?

Answer: Stereo headphones with each tone isolated to one ear

Binaural beats require each ear to receive a distinct frequency in isolation, which only stereo headphones reliably achieve.

The 'Schumann resonance' (approximately 7.83 Hz) is significant in meditation music because:

Answer: It is the resonant frequency of Earth's electromagnetic cavity and matches theta brainwaves

The Schumann resonance (~7.83 Hz) is Earth's natural electromagnetic frequency, which falls within the theta range and is cited as a potential natural entrainment reference.

Which measure describes the intensity of sound as perceived by the human ear rather than its physical pressure level?

Answer: Phon and sone scales of loudness

Phons and sones account for the ear's unequal sensitivity across frequencies, providing a perceptually weighted measure of loudness rather than raw acoustic pressure.

What effect does very slow amplitude modulation (0.1–0.5 Hz) of ambient music have on a listener's physiological state?

Answer: It can synchronize slow breathing or heart rate variability through entrainment

Extremely slow amplitude fluctuations in the infra-low range can pace respiratory and cardiac rhythms, supporting relaxation through physiological entrainment.

In psychoacoustics, 'temporal masking' refers to:

Answer: A loud sound masking a quieter sound that occurs shortly before or after it

Temporal masking occurs when a loud sound obscures the perception of a softer sound that occurs within milliseconds before (backward masking) or after (forward masking) it.

Which best describes the 'equal-loudness contour' (Fletcher-Munson curve) and its relevance to meditation music mixing?

Answer: A curve showing the SPL needed at each frequency to match the perceived loudness of a 1 kHz reference tone

Fletcher-Munson curves show that humans require more SPL at low and very high frequencies to perceive equal loudness, informing how meditation tracks are EQ'd for low-volume listening.

A practitioner reports that binaural beat sessions feel more effective when combined with slow diaphragmatic breathing. This is best explained by:

Answer: Slow breathing reduces sympathetic arousal, making the brain more receptive to entrainment

Slow diaphragmatic breathing activates the parasympathetic nervous system, lowering cortical arousal and creating conditions where entrainment stimuli are more effective.