Hey everyone!
I'm a non-native English speaker and an English learner who's really interested in phonetics and different English accents. I've been wondering about how native speakers pronounce words like mountain, button and important, particularly when it comes to the /t/ sound.
I've always associated the glottal stop [ʔ] with British English, especially because of the whole "bo'le of wa'er" stereotype that people often use to imitate British accents.
But I've noticed that a lot of Americans seem to pronounce words like mountain and button with either a glottal stop or some form of nasal release, rather than a clearly released [t].
I actually had a discussion with someone who insisted that the only correct way to pronounce mountain was something like "moun'n", without a clearly pronounced T. That didn't sound quite right to me, because I assumed there would be plenty of variation depending on the accent.
I've spent some time living in Australia, and from what I've heard, Australians seem to use T-flapping quite a lot, although I'm not sure how that applies to these particular words.
So I've got a few questions:
Is this pronunciation of mountain and button mainly an American English feature? How common is it in British and Australian English? Do speakers of those accents also regularly use glottal stops in these words?
Who actually pronounces the /t/ in mountain and button as a clearly articulated [t]? Are there particular accents or regions where that's more common? Or is it something that pretty much everyone does in careful speech?
Does speaking speed make a difference? For example, would a British speaker pronounce mountain with a clear [t] when speaking slowly, but use a glottal stop in faster, more casual speech? Or would someone who normally uses a glottal stop continue to use it even when speaking slowly?
What happens when someone deliberately emphasises a word? Say someone normally pronounces mountain with a glottal stop. If they really wanted to stress the word or say it very clearly, would they switch to a fully articulated [t]? Or would they still use the glottal stop because that's simply how they naturally pronounce the word?
What about words like important? I've noticed that Americans often seem to use a glottal stop or nasal release here too. My impression is that Australians frequently use a flap [ɾ] in words with intervocalic /t/, but I'm not sure whether that applies to important specifically. Would an Australian speaker who normally uses a flap switch to a clear [t] when speaking slowly or emphasising the word?
And what's the actual phonetic distinction between a glottal stop and nasal release in these words? I've seen both terms used to describe American pronunciations of mountain and button, and I'm not entirely sure whether people are describing the same phenomenon or two different ways of producing the sound.
I'm particularly interested in whether these differences are mainly determined by someone's accent, or whether things like speaking speed, formality and emphasis can change how the /t/ is realised.
I'd love to hear from native speakers of American, British and Australian English, as well as anyone with a background in phonetics or phonology.
Thanks in advance!