Cancel Noise with Sounds of Nature.
100% naturally recorded brown noise.

In today’s society, artificial noise abounds, yet methods like walls or earplugs are often insufficient.
As a result, many people struggle with sleep disorders or a lack of concentration in office environments.
Brown noise is a powerful method that masks noise by playing sounds in a frequency range similar to the noise itself, making it less perceptible.
However, the long-term effects of listening to artificially generated sounds remain scientifically unclear.
NNTM (Natural Noise Therapy & Meditation) is a 100% naturally recorded brown noise, inspired by how people since ancient times used the sounds of nature, such as rivers, to block noise and protect acoustic privacy.
Designed with maximum consideration for human health, it shuts down artificial noise to deliver high performance, quality sleep, and stress reduction.
NNTMTM’s nature-based brown noise, while 100% recorded from real sounds of nature, is designed to spread evenly across the same frequency range as everyday sounds. This coverage of broad noise-inducing frequencies helps maintain a noise-free environment that supports both mental and physical well-being.
*1 DSD (Direct Stream Digital) converts wideband signals directly into 1-bit digital data, representing sound amplitude through pulse waveform density. This waveform closely resembles the compression and rarefaction of sound waves in space, mirroring natural sound. DSD offers an exceptionally wide playback range—far exceeding 100kHz—along with ample dynamic range in the audible spectrum, enabling truer reproduction of the original sound.
*2 The audio used in this product is converted to 192kHz PCM format, the maximum playable on iPhone.
Using speakers, headphones, or earphones with a dynamic range faithful to the original sound ensures the balance of the sound’s frequency bands is preserved. When playing from an iPhone, it supports 192kHz PCM or DSD formats (DSD playback functionality will be added after April 2025). For best results, speakers, earphones, or headphones should at least support high-resolution audio playback.
How to play hi-res audio from an iPhone/iPadIn daily life, noise typically lies in the midrange of tens of hertz to thousands of hertz. Brown Noise is a type of noise that has a high density in the low to mid-frequency range, similar to everyday sounds. Because of this characteristic, it effectively masks (cancels out) everyday noise. For more details, please see the following article.
A powerful approach to noise reduction: What is Brown Noise?NNTM is particularly effective for achieving quality sleep and improving focus during work or study. For example, it provides powerful noise masking in situations where you might be disturbed by differing family schedules, bothered by neighbors or outside noises in an apartment, or want to block out chatter and typing sounds in an office. It can also be used during yoga, bath time, or meditation, offering high-quality recordings faithful to nature that help stabilize the mind. For more details, please refer to the article below.
Be freed from apartment or condo noise with “natural sounds” Achieve the Best Sleep with Natural Brown NoiseNNTM was born out of the developer’s personal struggle with late-night and early-morning noise from neighbors in their apartment, along with concerns about the health effects of artificial brown noise. This led to a focus on the calming effect of “natural sounds” for humans. Mountain and river sounds were recorded in 2.8MHz DSD format, covering the same frequency range as typical noise while placing minimal burden on the body. By continually refining these nature-based noise sources, a high degree of fidelity was achieved. The recordings featured in the NNTM App were personally used by the developer for over two years during sleep and work, and are now offered in an iOS app so that anyone can easily enjoy them in high quality via iPhone.