"prolonged speeches" is correct and usable in written English.
You can use it to describe a speech that is too long or takes a lot of time. For example, "The guest speaker's prolonged speeches kept the audience bored for an hour."
During the course of a competitive debate round, when you have prolonged speeches and issue-oriented, rapid-fire exchange of individual contradictions and line-by-line rebuttals, what ultimately decides these things is what we call crystallization -- being able to make holistic summaries of the jumble that you've heard.
There is a truculent edge to Rush's style; he omitted quotation marks (annoyingly, Joyceanly) in "Mating," and employs them here, but with so many unclosed sets, in prolonged speeches broken into paragraphs, that it takes vigilance to know who is talking.
Vowels are stretched and prolonged in speech.
But it wasn't the acceptance speeches that prolonged the night; there were too many stars doing fatuous presentations — even Melissa McCarthy wasn't funny.
Both doses of escitalopram did not produce any effect before or during the speech, but prolonged the fear induced by SPS.
This hate speech prolongs the systematic discrimination against the Shia minority and – at its worst – is employed by violent groups who attack them," said Sarah Leah Whitson, Middle East director at Human Rights Watch.
Over the next year, the family noticed language decline with word-finding difficulties; his speech was slow and had prolonged response latency.
People who stutter tend to lose their stutter when they sing, for several reasons: the words they are singing are prolonged, and the voice they use is smooth and delivered easier than normal speech.
Their heavy or prolonged use causes irritability, restlessness, hyperactivity, anxiety, excessive speech, and rapid mood swings.
Five subjects who had prolonged latencies with normal amplitude also showed good speech identification scores.
Unfortunately, the speech and the paper suggest that neither prolonged cogitation nor extravagant consultation have produced much that is new.
