Gray noise【集中力向上 睡眠改善 リラックスに役立つグレイノイズ】

The sound of the wind blowing in from outside the window on a night when the rain is falling quietly, the sensation of sleeping while listening to the sound of waves on the beach. Grey Noise has the image of reproducing such natural sounds. Grey noise can help you fall into a deep sleep when it is difficult to fall asleep in a quiet environment. It also blocks out external noise and improves concentration, making it ideal while working or studying. It also helps to relax and reduce stress as it resembles the sounds of the natural world. [Colored Noise List] Pink Noise    • Pink noise【ストレス激減　リラックス　深い眠りをもたらすピンクノイズ　自然の音】   Green Noise    • Green noise【深い睡眠　集中力向上　ストレス軽減　幸せホルモングリーンノイズ】   Blue Noise    • Blue noise【睡眠 集中 リラックス 夜泣き 癒し効果】   Brown Noise    • Brown noise【自然界の音 睡眠 集中 リラックス 安定した音色に潜む驚きの...   Purple Noise    • Purple noise【感性を解き放つ！緊張や不安を癒し 想像力を高めるパープルノイズ】   White Noise    • White noise【安眠と癒しを誘うホワイトノイズの驚きの効果】