Meditation Music Psychoacoustics and Brainwave Entrainment Questions and Answers

Question 1

A sound designer wants to create a brainwave entrainment track that can be effectively used with speakers, as the client does not want to require headphones. Which type of auditory beat should be the primary component of this track?

Accepted Answer

Monaural beats

Answer

Monaural beats are created by combining two slightly different frequencies in the air before they reach the ear. This creates a perceptible, physical pulse that does not require the isolation of headphones to be effective for brainwave entrainment. In contrast, binaural beats require headphones to send a separate frequency to each ear, with the brain creating the 'phantom' beat internally.

Question 2

When composing a meditation track, two synth pads playing sustained notes at 150 Hz and 180 Hz are perceived as dissonant and 'rough' by listeners. This psychoacoustic phenomenon is best explained by the two frequencies falling within the same:

Accepted Answer

Critical Band

Answer

The concept of critical bands describes how the cochlea of the inner ear acts like a series of overlapping filters. When two tones are close enough in frequency to fall within the same critical band, the auditory system has difficulty resolving them as separate tones, which can lead to a sensation of roughness or dissonance.

Question 3

Which of the following describes the neurological process that forms the basis of brainwave entrainment, where the brain's electrical activity synchronizes with the rhythm of an external auditory or visual stimulus?

Accepted Answer

Frequency Following Response (FFR)

Answer

The Frequency Following Response (FFR) is the evoked potential that describes how the brain's own electrical cycles (brainwaves) phase-lock or synchronize with the frequency of a periodic external stimulus, such as the pulsing of isochronic tones or the beat frequency of binaural/monaural beats. This is the core mechanism of brainwave entrainment.

Question 4

A meditation music producer wants to imply a very deep, low bass note (e.g., 35 Hz) that standard consumer earbuds cannot physically reproduce. Which psychoacoustic principle could they use to make the listener's brain perceive this low note even though it is not actually present in the audio?

Accepted Answer

The Missing Fundamental

Answer

The Missing Fundamental is a psychoacoustic phenomenon where the brain perceives a pitch corresponding to the fundamental frequency of a harmonic series, even if that fundamental frequency is absent. By including several higher harmonics of the 35 Hz note (e.g., 70 Hz, 105 Hz, 140 Hz), the producer can trick the brain into 'filling in' the missing low bass note, creating the illusion of deep bass on limited-range speakers.

Question 5

A practitioner is recording a guided meditation in a room with a faint, but noticeable, high-pitched hum from an air conditioner. To make this hum less distracting without altering the vocal recording, they decide to add a continuous layer of sound. This technique is an application of:

Accepted Answer

Auditory Masking

Answer

Auditory masking occurs when the perception of one sound is affected or rendered inaudible by the presence of another sound. By introducing a carefully selected sound (like white noise or a gentle synth pad) that shares frequency characteristics with the hum, the distracting sound can be effectively 'covered' or masked, blending it into the background and making it less perceptible to the listener.

Meditation Music Practice Test

Meditation Music Practice Test

Meditation Music Psychoacoustics and Brainwave Entrainment Questions and Answers