價格：免費
更新日期：2018-07-24
檔案大小：1.7 MB
目前版本：2.0.4
版本需求：需要 iOS 9.3 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Sound levels are usually expressed in a logarithmic scale called the decibels (dB). The decibels can not be added or subtracted directly.
Each operations between decibel values requires to convert the sound level back to a linear scale using an antilog function.
The dB calculator allows the direct addition or subtraction of dB levels. The app uses the following formula:
A + B = 10*LOG10(10^(A/10) + 10^(B/10))
For instance, 5dB + 5dB returns 8dB (3dB is added when doubling the sound level) or 1dB + 2dB = 4.5dB.
支援平台：iPhone