Use Stereo Headphones Quietly
Check left/right orientation, set device volume low, and keep the conservative browser output.
Channel-separated beat workspaceLocal audio
Ready — sound is off
Stereo headphones are required for separate left- and right-channel tones.
Left ear195.00 Hz
Right ear205.00 Hz
Beat-frequency presets (conventional band labels only)
Browser audio signal toolkit
Binaural Beats Generator
This binaural beats generator sends a different tone to each stereo channel, displays the exact left and right frequencies, adds optional noise, and exports the same channel-separated signal locally.
What Is a Binaural Beats Generator?
A binaural beats generator creates two steady acoustic tones with a small frequency difference and routes one tone only to the left channel and the other only to the right. This page uses a center-carrier convention: left equals carrier minus half the beat frequency, and right equals carrier plus half the beat frequency. With a 200 Hz carrier and a 10 Hz beat setting, the generated values are 195 Hz left and 205 Hz right.
Stereo headphones are required to keep those two tones separate at the ears. Ordinary speakers mix through the room and do not create the same listening arrangement. The binaural beats generator does not use a microphone, read brain activity, or measure an EEG. Its Delta, Theta, Alpha, Beta, and Gamma preset labels are conventional frequency-band names only; selecting one does not prove that a listener enters a corresponding brain state.
Three simple steps
How to Get Started
Use this binaural beats generator deliberately: set the signal, begin quietly, and interpret only what the workflow can actually show.
Set Carrier and Difference
Choose a carrier and beat value, then verify the calculated left and right frequencies before Play.
Add Background or Export
Optionally mix low-level white, pink, or brown noise, set a timer, or save a short stereo WAV.
How to Get Started
Connect stereo headphones and confirm they are oriented correctly. Enter a carrier from 20 Hz to 20 kHz and a beat difference from 0.1 to 100 Hz. The binaural beats generator immediately recalculates both channels and validates them against the active audio sample rate when playback begins. It never silently turns an invalid value into a very different tone. Read the visible left and right values before pressing Play.
Start with the sine waveform and 10 percent output. Sine waves avoid extra harmonics and make the frequency relationship easiest to interpret. Triangle is available for an audibly richer demonstration, but its harmonics make the sound more complex. Pressing Play again cannot stack another pair, and Stop fades both oscillators plus any background noise before disconnecting them.
How Binaural Beat Frequencies Are Calculated
The carrier is the midpoint, not the left-ear frequency. The binaural beats generator calculates left = carrier - beat / 2 and right = carrier + beat / 2. The arithmetic difference between the channels therefore equals the requested beat setting exactly. A 300 Hz carrier with a 6 Hz difference produces 297 Hz on the left and 303 Hz on the right. This symmetric convention keeps the average pitch centered on the carrier.
Other tools sometimes use a left carrier plus a right offset. That convention is valid when clearly labeled, but it yields a different center. This page does not switch models behind the interface. The calculated channels must remain above zero and below the runtime Nyquist limit. If a carrier and difference would violate either condition, an inline message explains the problem and Play and Export remain unavailable.
Why Stereo Headphones Matter
True channel separation is the defining playback requirement here. The left oscillator connects to input zero of a two-channel merger, while the right oscillator connects to input one. A shared master ramp controls level without panning both sources toward the center. The stereo diagram and numerical labels repeat this routing in visible form. The exported WAV also writes the two frequencies to separate left and right PCM channels.
With loudspeakers, both ears generally receive both tones after direct sound and room reflections combine. That may produce ordinary acoustic beating in the air, but it is not the separated headphone condition this binaural beats generator is designed to provide. Mono accessibility settings, mono Bluetooth devices, crossfeed, spatial audio, or unusual adapters can also reduce separation. Check device settings if both channels seem identical.
Carrier Frequency vs Beat Frequency
Carrier frequency determines the central audible pitch. Beat frequency determines the separation between the left and right tones. A 10 Hz beat setting does not make the headphones play a 10 Hz acoustic tone; the channels play audible values around the selected carrier. The binaural beats generator displays all three values so that difference is explicit. Very low beat values can take several seconds to compare subjectively.
Choose a carrier that your headphones reproduce comfortably. Do not raise volume to chase an inaudible high carrier or assume low carriers are harmless. Hardware response, fit, level, and hearing affect perception. This page reports requested digital oscillator frequencies but cannot verify the acoustic frequency or level reaching either ear.
Delta, Theta, Alpha, Beta, and Gamma Labels
The preset buttons offer 2, 4, 6, 8, 10, 12, 20, and 40 Hz differences. Labels beside them follow commonly used conventional EEG-band names: Delta, Theta, Alpha, Beta, and Gamma. Those names classify ranges used when discussing measured electrical activity. Here they label a user-selected difference between two audio channels. The binaural beats generator does not measure electrical activity or provide neurofeedback.
A matching number in two domains does not establish a guaranteed physiological result. Selecting a 10 Hz difference does not demonstrate that the brain produces a 10 Hz rhythm, and the page does not promise sleep, healing, improved memory, anxiety relief, IQ changes, meditation, or treatment of any condition. Use presets as convenient signal demonstrations, not outcome buttons.
Adding White, Pink, or Brown Noise
Optional background noise is generated as a separate stereo buffer and mixed below the two tones. White noise is flat per hertz before playback shaping, pink noise follows a gentler downward spectrum, and brown noise emphasizes low frequencies through stabilized integration. The background control appears only after a color is selected. At zero it contributes nothing.
Noise does not replace or collapse the channel routing: the left tone remains left and the right tone remains right. Keep background level modest so the two calculated frequencies remain audible. Adding noise changes the combined signal and can reduce available headroom, which is why the binaural beats generator uses conservative limits. Export reproduces the chosen background color and level locally.
Common Listening and Demonstration Uses
A teacher can use the binaural beats generator to demonstrate stereo routing, frequency differences, and the distinction between carrier and beat values. Audio users can verify that a file contains different left and right pitches. Listeners may explore how small differences sound through headphones or use the timer to limit a session. These are direct uses of the generated signal rather than claims about cognition.
Research discussions around binaural listening use varied protocols, populations, outcomes, controls, and signal settings. A simple web generator cannot transfer every published finding to every user, and this page does not evaluate evidence for a personal medical decision. Preference or a subjective experience can be real to a listener without proving a general therapeutic mechanism.
Device, Volume, Timer, and Export Limits
The timer offers off, five, ten, fifteen, thirty, and sixty minutes. It stops the graph with a short fade, but background-tab suspension can delay browser timers. The binaural beats generator should not be used as an alarm. Avoid listening while driving, cycling, operating equipment, or in any situation where stereo isolation or reduced environmental awareness would be unsafe.
WAV export is limited to five, ten, or thirty seconds to keep memory use reasonable. It creates a stereo 16-bit PCM file with short edge fades, exact displayed channel frequencies, waveform, output level, and optional background. Browser gain is not dB SPL, and the file has no calibrated playback level. Stop if either tone is uncomfortable and do not increase volume sharply to force perception.
Clear answers
Frequently Asked Questions
Do I need headphones for this binaural beats generator?
Yes. Stereo headphones are needed to deliver separate left- and right-channel tones. Speakers mix the channels through the room.
How are the two frequencies calculated?
Left is carrier minus half the beat value; right is carrier plus half the beat value.
Does the tool read brain waves?
No. It only generates audio. Conventional band labels do not measure or prove an EEG state.
Can I add background noise without losing stereo separation?
Yes. Noise is mixed separately while each tone remains assigned to its own channel.
Does a preset guarantee sleep or focus?
No. Presets are neutral frequency-difference examples and carry no guaranteed cognitive, sleep, or medical outcome.