What are SereneSynth focus protocols?

SereneSynth protocols are structured sound sessions built from defined acoustic conditions, research findings, and practical listening routines. They offer automated interval sequencing (such as 25-minute focus and 5-minute break blocks) with calibrated sound conditions including quiet, white noise, pink noise, brown noise, and binaural conditions.

How does brown noise support concentration?

Brown noise provides a deep acoustic spectrum with a -6 dB per octave power falloff (1/f²), attenuating sudden environmental acoustic distractions and creating a steady, low-distraction auditory background.

What acoustic conditions are investigated in the ADHD focus protocol?

The ADHD focus protocol prioritizes research-informed conditions: White Noise (primary evidence-supported condition), Pink Noise, 15-Hz Binaural (400 Hz left / 415 Hz right / 15 Hz beat / 407.5 Hz carrier — preliminary ADHD-specific human evidence for subjective studying performance), Quiet (reference), 40-Hz Binaural (experimental general-attention condition; not ADHD-specific), and Brown Noise (exploratory).

What acoustic conditions are included in the Student focus protocol?

The Student focus protocol focuses on core conditions: Quiet (primary reference), White Noise (comparison condition), and Pink Noise (comparison condition), with clearly labeled experimental conditions including 40-Hz Binaural (320 Hz left / 360 Hz right / 40 Hz beat / 340 Hz carrier), 15-Hz Binaural, and Brown Noise.

Do binaural beats require stereo headphones?

Yes. Binaural beats require stereo headphones because isolated frequencies must be delivered to each ear separately for the brainstem's superior olivary complex to compute the perceptual interaural difference frequency.

How do I verify SereneSynth's frequencies myself?

Download our 16-bit PCM WAV sample or capture audio directly from your browser. Open Audacity (or any standard DAW like Reaper or Ableton), select Analyze → Plot Spectrum, set the algorithm to Spectrum, window function to Hanning, and FFT size to 16,384. You will observe the exact carrier frequencies and spectral slope displayed on this page.

Why is there no 40Hz peak in the spectrum?

Binaural beats do not exist as physical acoustic oscillations in the air. We deliver an isolated 200.0 Hz tone to the left channel and a 240.0 Hz tone to the right channel. The 40.0 Hz gamma beat is a neurological illusion computed in your brainstem's superior olivary complex through interaural phase difference integration.

Is your brown noise really -6 dB per octave?

Yes. Our Brownian noise generator uses a continuous first-order random walk integration algorithm that produces a true 1/f² power spectral density (-6 dB/octave decay), paired with a 400 Hz low-pass filter to attenuate harsh high frequencies while maintaining authentic Brownian acoustics.

Do I need headphones for binaural beats?

Yes, stereo headphones or isolated earbuds are mandatory for true binaural beats. Because each ear must receive an isolated carrier frequency without physical acoustic crosstalk in the room, open-air speakers cannot produce the necessary interaural neurological beat.

What FFT settings did you use?

Both our live browser spectrum analyzer and Audacity cross-verification runs utilize a 16,384-bin Fast Fourier Transform (FFT) with a standard Hanning window function at a 44.1 kHz sampling rate, providing a frequency bin resolution of approximately 2.69 Hz for pinpoint carrier measurement.

Empirical Measurement Lab

Proof Lab — We Measured Our Own Sound Generators

What we can measure: carrier frequencies, spectral slope, sample accuracy. What we cannot: the 40Hz beat itself — it is an interaural, perceptual event created in your auditory cortex, not a tone in the air. Anyone selling you a '40Hz tone recording' is selling physics fiction.

16,384-Bin FFT Spectral Verification

Independent verification and uncompressed 16-bit PCM WAV datasets validating 200 Hz / 240 Hz stereo separation, pure harmonic sine wave synthesis, and -6 dB/octave Brownian slope integration.