word-request
In writing when we want to show the reader that there are radio interferences so some words of the broadcaster are lost, how to write it? What is the classic or the preferable way?
In Russian it's usually just "шшшшш.. шшш" or like that.
I imagine it should be something like:
[Broadcast] "And now we.." Shhhh.. "the.." Shhhh.. "..a happy day."
Amadan's answer is the most neutral and polite way to ask, but there are plenty of other things you could say:
I wouldn't use "white glass"; just look it up on Google, that means something made of glass but with a white tint, and you can't see through that kind of glass.
The glass in a household mirror is transparent, but since all glass in those kind of mirrors is transparent, you don't need to mention it. In fact, they all contain glass, so even saying "glass mirror" would be a little redundant.
If you do feel the need of describing it, "clear glass" (thanks @MichaelHarvey), "transparent glass" and "colourless/colorless glass" (depending on whether you write British or American English) are technically correct and should be understandable. The first option is used most often:
(source: Google Ngrams)
Best Answer
Answering the question "What is an onomatopoeia for radio static and the blaring noise of a TV?" the top score answerer-2018, a native English speaker from the USA, suggested to write it as "hissss..." or "hiss" for short.
Not having found any other online solution to your question, I would rely either on that answer or on @Michael Harvey's suggestion, depending on whether the sound is being heard as voiced or unvoiced.