One of the biggest concerns regarding noise in an apartment or condo is the sound of footsteps from neighbors—either next door or from the unit above. These typically fall in the 20Hz–400Hz range. If you’re bothered by your neighbor’s conversations, those frequencies hover around 80Hz–250Hz. NNTM’s Natural Brown Noise masks these sounds with maximum consideration for your well-being, freeing you from irritating noise. This approach is highly recommended for those suffering from sleep disturbances caused by late-night or early-morning noise.
For more details → A powerful approach to noise reduction: What is Brown Noise?
The best way to address issues that disturb your sleep is to play NNTM through a speaker while also using earplugs.
After downloading the NNTM App on your iPhone, connect it to a speaker and play the sound source. Choose the optimized track you prefer. In addition to a meditative effect as background sound, the masking effect will help your brain ignore noises such as footsteps.
Speakers range from just a few thousand yen to several tens of thousands of yen—or more. Feel free to use any speaker you already have, or purchase a new one. A recommended mid-range option is SONY’s SRS-XG300 (https://amzn.asia/d/6g076zO), priced at around 26,500 yen. We’ve verified its dynamic range to be faithful to the original sound, and it’s also very user-friendly.
The simplest setup is to connect your iPhone directly to the speaker. However, to get the most out of NNTM’s acoustic quality, we recommend placing a DAC between your iPhone and the speaker. You can find DACs for around 10,000 yen, and the article below explains more.
