No. A monaural beat is made by mixing two close tones before they reach your ears, so the beat is already present in the sound. It works on any speaker, phone, or laptop. Headphones are optional.
Binaural beats send a different frequency to each ear and rely on the brain to combine them, which is why they need headphones. Monaural beats combine the two tones in the audio itself, so the pulse is audible in the open air and plays through any speaker. Monaural beats are smoother than isochronic tones, which switch fully on and off.
Start in the Alpha range (8 to 13 Hz) for calm focus, Theta (4 to 8 Hz) for relaxation, or Delta (1 to 4 Hz) for winding down toward sleep. Keep the carrier between about 200 and 400 Hz, keep the volume low, and try 10 to 20 minute sessions first.
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