When parents give a bracha before Shabbos to children over the telephone, can a child say amen? Is that bracha really considered a bracha or is it in a different category like when people give "brachos" at the end of a phonecall? Does it matter which category it's in for saying amen over the telephone?

When parents give a bracha before Shabbos to children over the telephone, can a child say amen? Is that bracha really considered a bracha or is it in a different category like when people give "brachos" at the end of a phonecall? Does it matter which category it's in for saying amen over the telephone?

I would like to make one correction: in this shiur it says that Rav Ovadia Yosef holds that you can use a microphone for shomeia keoneh. However, in יחוה דעת חלק ג סימן נד he says explicitly that you're not yotzei (unless you can hear even without the microphone). The tshuva quoted (יביע אומר חלק ז אורח חיים סימן יח) was about hearing aids ("מכונת שמיעה חשמלית"), which Rav Ovadia compares to false teeth and glasses.