首先我们要知道的是dB是一个功率增益的单位，表示一个相对值；dBm是一个功率的单位，表示一个绝对值。 dB是什么？ dB展开应写为decibel，其中“deci-”为十分之一，而“bel”则是电话发明人贝尔的名字。在上个世纪，通信工程师们发现电话线越长，衰减量越大 ...

Genetic deficiency of otoferlin, a protein critical to synaptic transmission by the sensory hair cells of the ear, causes congenital deafness. Medicines to treat the condition are lacking; children ...

Online forms are an excellent way to conduct research, collect feedback, test knowledge, and more. Here’s how to use Microsoft Forms to create surveys, feedback forms, quizzes, and other interactive ...

Here are all the cheat codes available on PlayStation in GTA 5 Story Mode, starting with vehicle and item spawns. Here are all the cheat codes available on Xbox consoles in GTA 5 Story Mode, starting ...

Three passengers loitering on a local train after it reached its final station caught the driver unawares in Cologne. Police are seeking an unknown individual for ...

‘Have I Got News for You’ guests mock RFK Jr.’s testimony ...

State pensions will rise by 4.8% next year while index-linked DB benefits will grow by as much as 3.8% following the release of September inflation figures today (22 October). This morning, the Office ...

This article is reprinted by permission from NextAvenue.org. Are extramarital affairs confined to those in the first half of life? Does a woman’s interest in having a romantic relationship outside of ...

MADRID (Reuters) -Real Madrid’s fans were in no mood to forgive Barcelona forward Lamine Yamal during Sunday's Clasico for his provocative remarks ahead of the game. The 18-year-old Barca forward had ...

New York Jets cornerback Sauce Gardner, who is in the NFL's concussion protocol, is not expected to play against the Cincinnati Bengals in NFL Week 8 at Paycor Stadium, according to a report via ...

Tempers flared at the end of Sunday night’s game at Arrowhead Stadium, which could result in a key Detroit Lions defender receiving another fine from the NFL. Following their 30-17 loss to the Kansas ...