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】

Green noise, with a frequency of around 500 Hz, has a lower frequency than higher frequencies and is reminiscent of nature, such as ocean ripples, waterfalls and murmuring rivers. The autonomic nervous system enters a relaxation mode, leading to a deep sleep. Some people find it more effective for concentration by covering up noises and noises and by having fewer high-frequency sounds. Make good use of green noise, which reduces the secretion of stress hormones and promotes the happy hormone oxytocin, to create a comfortable environment for studying, working and sleeping. [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】   Gray Noise    • 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】   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】