Silence Colors Noise

“Silence, whatever it is, is not a sound, it's the absence of sound, and yet it often feels like we can hear It.” says Chaz Firestone, assistant professor of psychological and brain sciences and director of the Hopkins Perception & Mind Laboratory.

A Brazilian study consisted of 66 people with normal hearing and no Tinnitus, found that among subjects placed in a quiet environment where they were asked to focus on their hearing senses, 68 percent experienced phantom ringing noises similar to that of Tinnitus.

People with Tinnitus hear a constant ringing; buzzing; rushing; pinging; clicking; whistling, or roaring sound in their ears. Some describe it as a freight train constantly rolling through their brains.

A ringing in the ears is heard when it's quiet, but it's really just the sound of blood gushing through the ear drum and pressing against the air. It's a sort of tension, not quite a vibration, but enough of a movement to make one think there's a noise.

Much like light, different colors of noise have significantly different properties. Simulated power spectral densities as a function of frequency for various colors of noise. The power spectral densities are arbitrarily normalized such that the value of the spectra are approximately equivalent near 1 kHz.

Sound comes at us in waves: tight, short waves (high frequency), long, loping waves (low frequency), or anywhere in between.

Pink noise, is a signal or process with a frequency spectrum such that the power spectral density is inversely proportional to the frequency of the signal. In it, each octave interval carries an equal amount of noise energy. It sounds like a waterfall, it promotes relaxation, enhances memory, and stimulates growth hormone production. . Pink noise is used to reduce brain waves.

Brown noise, is similar to white noise's static untuned radio sound, but with the low frequencies boosted and the high frequencies lowered. This counteracts the human ear's natural proclivity to hone in on and prioritize higher frequencies. Brown noise promotes concentration. Pink + Brown noise helps Tinnitus. It helps increase concentration, improve creativity, and reduce stress.

Since people with ADHD can get easily distracted by surrounding stimuli, listening to Brown noise could help minimize auditory distractions, allowing them to concentrate better on what they're doing. Brown noise promotes concentration.

White noise, is sometimes referred to as broadband noise. In signal processing, it is a random signal having equal intensity at different frequencies, giving it a constant power spectral density.. Its benefits include masking sounds, helping sleep, as brown noise helps relax, and pink noise helps focus not only by blocking out household noise, but can help children relax and fall asleep.

People with Anxiety tend to be on high alert... The use of Pink or Brown noise may reduce their reactivity to those little sounds in their environment and support calming, sleep, or even concentration. The frequencies picked up in Pink noise fall between White and Brown noise and are also thought to aid in sleep.

Green noise, is a frequency of White noise. It reminds people of nature more than other frequencies (hence the description “green noise”). Green noise is perfect for relaxation, it helps the brain and body to relax, making us more primed for sleep.

Green and Brown noises, are thought to help with falling asleep, as brown noises are thought to help with staying asleep a little better. Pink and white noise can also be helpful for sleep, as they all block out external sounds.

Red noise, is characterized by a deeper, heavier sound and has been shown to have a calming effect on the brain. It can be used as a tool for improving sleep, reducing stress and anxiety, and even boosting productivity and creativity.

Blue noise, is essentially the opposite of Brown noise — its energy is concentrated at the high end of the spectrum, meaning it's all treble and no bass. You'd most commonly use blue noise to minimize distortions during sound engineering’

Purple noise, it's the opposite of brown noise. The volume goes up when the frequency does and it gains power faster than blue noise. It's one of the higher-pitched color noises. It's often used to treat tinnitus, a condition that causes loud ringing in one or both ears.

Orange noise, is a combination of pink and blue noises, with peaks in the middle of the frequency spectrum. While all noise colors can potentially serve as sounds to help you sleep, white, pink, and brown noise are the most commonly used.

Yellow noise, is a type of noise that has a balanced frequency spectrum, similar to white noise, but with a slightly warmer and more soothing sound. Yellow noise ambience may elevate your mood & reduce stress.

Grey noise, isn't the sort of thing you'd put on when you've got excess energy to dance off, nor will it make the best impression at a dinner party you host, but it can help with sleep, concentration, sound isolation and even tinnitus.

Black noise, is an informal term used to describe lack of noise. It refers to complete silence or mostly silence with bits of random noise. While it may be difficult to find complete silence, it can help you sleep at night. Some people feel most relaxed when there is little to no noise. The spectral density of black noise is roughly zero at each frequency.

Dark noise, is just like the color black is the absence of light, black noise is the absence of sound, with zero power at all frequencies. Black noise is known for being the color of silence.

Golden noise, is focused noise emphasizing 50hz to 250hz area of the audio spectrum.

Velvet noise, is a sparse ternary pseudo-random signal containing only a small portion of non-zero values. In this work, the derivation of the spectral properties of velvet noise is presented. In particular, it is shown that the original velvet noise is white, i.e. has a constant power spectrum.

A mind is so noisy due to colorful mental chatter, that constant stream of thoughts and inner-dialogue that can be distracting, overwhelming, and even anxiety-inducing. Mental chatter can take many forms, from rumination about the past to worry about the future, and it can be difficult to manage...

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Food for thought!