Gamma
30–100 Hz
Cognitive processing, memory, and learning
40 Hz
Memory Boost
Moderate
Meta-analysis
Binaural beats overall had a medium effect on memory and attention across 15 studies (g=0.40); results varied between frequencies.
Beta
13–30 Hz
Active thinking, focus, and alertness
20 Hz
Long-Term Memory
Moderate
Controlled study
20 Hz beta beats improved word recall and recognition vs white noise; 5 Hz theta lowered recall.
18 Hz
Language Focus
Moderate
Randomized study
18 Hz beats improved accuracy and speed on complex sentence comprehension; 40 Hz did not.
16 Hz
Sustained Focus
Moderate
Randomized crossover
Gamma beats improved general attention but did not stop focus fading over a long task.
15 Hz
Working Memory
Moderate
Controlled study
Of six sound conditions, only 15 Hz beats improved N-back working-memory accuracy.
15 Hz
Working Memory
Preliminary
EEG study
Accuracy held steady with 15 Hz beats through a fatiguing task; questionnaire scores did not differ.
Alpha
8–13 Hz
Relaxed awareness, calm focus, anxiety reduction
10 Hz
Calm
Strong
RCT
Binaural beats lowered anxiety and pain scores during cystoscopy and stent removal.
10 Hz
Calm
Strong
RCT
Pre-surgery anxiety fell 26.3% with binaural-beat audio vs 11.1% with the same audio without beats.
10 Hz
Calm
Strong
RCT
Binaural-beat music lowered anxiety and raised tolerance before unsedated endoscopy.
10 Hz
Calm
Preliminary
Uncontrolled pilot
8 of 11 children with ADHD improved on attention measures after 10 Hz audio-visual entrainment; no control group.
Theta
4–8 Hz
Deep relaxation, meditation, creativity, pain relief
6 Hz
Deep Relaxation
Preliminary
Pilot study
State anxiety fell 26.5% when a binaural-beat meditation program was added to psychiatric care (n=8 group).
6 Hz
Deep Relaxation
Preliminary
QEEG study
6 Hz beats raised activity across the brain within 10 minutes.
5 Hz
Ease
Strong
Double-blind RCT
5 Hz beats lowered chronic pain ratings (5.6 to 3.4 out of 10) and analgesic use vs sham.
Delta
0.5–4 Hz
Deep sleep, healing, restoration
3 Hz
Deep Sleep
Moderate
Controlled sleep-lab study
A 3 Hz beat lengthened deep N3 sleep and shortened time to reach it vs sham.
3 Hz
Deep Sleep
Strong
RCT
Binaural beats with matching light reduced the sedative dose children needed during surgery.
2 Hz
Sleep Induction
Preliminary
Crossover pilot
Beats varying between 0 and 3 Hz shortened time to fall asleep vs silence (n=10).
1 Hz
Deep Rest
Preliminary
Uncontrolled pilot
After 60 days of daily delta binaural beats, trait anxiety fell and quality of life rose; no control group.