The decibel expresses a change in value (e.g. Two signals whose levels differ by one decibel have a power ratio of 10 1⁄ 10, or root-power ratio of 10 1⁄ 20. It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. The decibel is a relative unit of measurement equal to one tenth of a bel. The decibel is used to express the values of logarithmic ratio quantities whose numerical values are based on the decadic logarithm. 1 dB = 0.1 B, where one bel is equal to the decadic logarithm of a ratio between two power quantities of 10:1, or the decadic logarithm of a ratio between two root-power quantities of √10:1 One decibel is equal to one tenth of a bel, symbol B. The decibel, symbol dB, is a non-SI unit accepted for use with the SI. The default values day, evening and night are 07.00 to 19.00, 19.00 to 23.00 and 23.00 to 07.00 respectively.Decibel Non-SI unit accepted for use with SI Name
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |