Decibel Tester: Sound Level 與 Frequency Generator clear wave 使用情況與統計

Decibel Tester is a comprehensive sound level meter app that features as exclusive accuracy of measurements and supports dBa, dBb, dBc and dBz. We are living in a noisy world, full of many things and sources produce amounts of noise. We need to protect our hearing, we need to test nosie in our surroundings and others to avoid exposing our earsto harmful noise levels. Don't worry! Decibel Tester provides professional sound level meter measurement results. With Decibel Tester, you can measure how quiet of your room or how loud of a rock concert with actual Nor140 high-precision decibel meter. Decibel Tester owns many professional functions of sound level meters. FEATURES: -Reliable and accurate measurements -Supports frequency weighting: ITU-R 468, A, B, C, Z -Save and share recordings and spectrum -Audible frequency range between 20 to 16,000 Hz SUBSCRIPTION: App offers an optional $6.99 monthly and $29.99 annual subscriptions: Payment will be charged to your iTunes account at confirmation of purchase. Subscriptions will automatically renew unless autorenew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal in accordance with your plan, within 24-hours prior to the end of the current period. You can manage or turn off auto-renew in your Apple ID account settings any time after purchase. Please note, any unused portion of a free trial period will be forfeited when making a purchase of an auto-renewing subscription. By downloading and using the app you are agreeing with Terms of Use: https://sites.google.com/view/decibeltestertou/home Privacy Policy: https://sites.google.com/view/decibeltesterpp/home