Violet Noise (Purple Noise) — Listen Online
Violet Noise shifts even more relative energy toward the upper frequencies than Blue Noise. It can sound piercing on some headphones, so this original ten-minute master is presented primarily for careful comparison at low volume.
Listen to Violet Noise
Press Play; nothing starts automatically. With JavaScript, the shared player keeps listening active across pages and gives access to Volume, Sleep Timer and Dark Screen. Native MP3 controls remain available without JavaScript.
This master passed automated source checks. The site owner has approved the current 10-minute audio master. Realism varies by listener; use a comfortable volume.
Compare Violet Noise with other sounds
Hear the actual, different audio files. Switching selections preserves the existing sleep-timer deadline; recordings are not automatically matched for loudness. Start at a low volume when changing tracks.
To read details about another recording rather than just audition it, use its dedicated page: Blue Noise · White Noise · Soft White Noise.
What does Violet Noise sound like?
The idealized violet-noise power spectrum rises with frequency squared. Our measured master shows a positive slope around +20 dB per decade. That is far steeper than White Noise's near-flat power distribution.
How it differs from related sounds
Blue Noise rises more gently toward the treble; Violet Noise has an even stronger upper-band bias. This does not make it more effective for sleep or hearing-related uses.
Five-band spectrum of Violet Noise
A separate high-frequency acoustic color, sometimes called purple noise. This chart displays sampled decoded-signal amplitude density, grouped by frequency. Values come from our source QA measurement code; no frequency response is guessed from a color name.
Bars are relative to the strongest band of this track only, not calibrated SPL or loudness at your ears. Numeric dBFS values are for decoded source measurements, not decibels in the room. Audio was measured with 16,384-point Welch analysis across four sampled portions of the 10-minute master. The fitted 120–6,000 Hz spectral slope is +20.01 dB per decade. Digital integrated level: -26.0 LUFS; true peak -16.8 dBTP. Neither proves a particular hearing-safe volume.
Understanding Violet Noise
Why Violet Noise is more treble-heavy than Blue
Violet noise, also called purple noise, is commonly defined by a power spectral density proportional to frequency squared. A tenfold frequency increase ideally corresponds to a +20 dB change in power spectral density. The analyzed 600-second master measures +20.01 dB per decade across its specified fitting range. Blue Noise is shallower at about +10.01 dB per decade, while ideal White Noise is approximately flat.
Because this spectrum emphasizes upper frequencies so strongly, Violet Noise can sound particularly thin, bright or penetrating, depending on your speaker and hearing. A higher spectral slope does not imply more efficient masking, better sleep, or a safer listening sound. It also does not make the audio ultrasonic: the downloadable file is ordinary audible-range digital audio.
How to listen without confusing spectrum and volume
Listen to Blue Noise and Violet Noise sequentially at a deliberately low level. The tracks have different measured integrated digital loudness, so a fixed system volume may not create a fair comparison. Adjust for comfort rather than forcing both to sound equally strong; high-frequency exposure and hearing sensitivity vary. For less treble, try Soft White Noise or standard Pink Noise. Neither noise file is a calibrated diagnostic tone or a medically validated treatment.
For conventional spectral definitions, see IEEE's colored-noise overview and the American Academy of Audiology's listening-volume caution. These are references for the physical principles, not endorsements of the recording.
Choosing a listening situation
Try short listening intervals to understand spectral differences, starting with the device volume set low. Avoid treating this recording as a hearing test or speaker-cleaning signal.
Audio source, quality and transparency
Created by WhiteNoiseChoir as an original, independently generated, 600-second DSP file. It is not a recording of a physical source and not a short repeated clip stretched to ten minutes.
- Source type
- Original independently generated synthetic sound
- Independent source material
- 600 seconds of independently generated material
- Published MP3 master
- 600 seconds · 44.1 kHz · 192 kbps · centered stereo
- Integrated digital loudness
- -26.0 LUFS
- Measured true peak
- -16.8 dBTP
- Measured spectral tilt
- 20.01 dB per decade (overall fitted slope)
- QA status
- Technical checks PASS · owner-approved for listening
- Playback transport
- Native multi-cycle HLS on supported Safari; looping MP3 otherwise
Questions about Violet Noise
Is Violet Noise the same as Blue Noise?
No. Both are high-frequency-weighted, but the ideal violet spectral slope is steeper than blue.
Does a higher-frequency sound mean more useful masking?
Not necessarily. Masking depends on the unwanted sound, listening environment, speaker response and comfortable sound level.
Does the sound stop after ten minutes?
No. Ten minutes describes the MP3 master; the player uses continuous HLS or MP3 looping until stopped, the timer expires, or your device interrupts playback. HLS repeats the master rather than creating additional independent audio.
Is Purple Noise different from Violet Noise?
In common audio terminology, purple noise and violet noise are alternate names for the same idealized power spectrum, which rises with frequency squared. The actual reproduced sound still depends on the rendered file.
Is Violet Noise safe for speaker cleaning?
This file was designed to demonstrate a treble-weighted spectrum, not to clean hardware. Raising it to high volume for a speaker-cleaning experiment is not recommended.