Otosan vs Silent Scan

Enter any value from 20Hz to 20,000Hz to play your favorite frequency, or use the slider to test your hearing range. Frequencies like 432Hz and 528Hz are popular for relaxation, meditation, yoga, studying, and sleep. The built-in tuner also works great for tuning instruments. Simple design with a retro feel. Includes 3 bonus tracks: RetroTone_A440.0Hz / RetroTone_A432.0Hz / RTSHealing_A432.0Hz.

Silent Scanは、0〜50Hzの低周波域に特化した振動測定・記録アプリです。 スマートフォン内蔵の加速度センサーを使用し、床や構造物を通じた低周波振動をリアルタイムで検出・可視化します。 【主な機能】 ・0〜50Hzのリアルタイム低周波振動測定 ・低周波域の周波数スペクトル表示 ・測定履歴の保存と管理 ・GPS位置情報と連携した測定記録（Premium） 低周波振動は人が感じにくいにもかかわらず、体調不良や睡眠障害の原因となることがあります。Silent Scanは日常では気づきにくい低周波域の振動を可視化し、生活環境の状況把握にお役立てください。 静かな場所探しや、振動環境の確認にご活用ください。 【利用規約】 https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Silent Scan is a vibration measurement and recording app specialized for the low-frequency range of 0–50 Hz. Using your smartphone's built-in accelerometer, it detects and visualizes low-frequency vibrations transmitted through floors and structures in real time. [Key Features] • Real-time low-frequency vibration measurement (0–50 Hz) • Frequency spectrum display for the low-frequency range • Save and manage measurement history [Key Features] • Real-time low-frequency vibration measurement (0–50 Hz) • Frequency spectrum display for the low-frequency range • Save and manage measurement history • Measurement records linked with GPS location data (Premium) Although low-frequency vibrations are hard for people to perceive, they can sometimes cause physical discomfort or sleep problems. Silent Scan visualizes low-frequency vibrations that are difficult to notice in daily life, helping you understand the condition of your living environment. Use it to find quieter places or to check the vibration environment around you. [Terms of Use] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/