/t/ becoming /p/

/t/ → /p/

The plosive alveolar /t/ becomes a plosive bilabial /p/ when it’s followed by a bilabial sound, such as /p/, /b/ or /m/, because of assimilation. The change only affects the place of articulation, but the manner of articulation (plosive) and the voicing (voiceless) remain the same.

 

Therefore,

/t/ (followed by /p/, /b/ or /m/) becomes /p/

sound_loud_speaker That person.      ǀ ðæp ˈpɜːsən ǀ

sound_loud_speaker It boils.      ǀ ɪp ˈbɔɪlz ǀ

sound_loud_speaker That money.      ǀ ðæp ˈmʌni ǀ

 

And here are some examples taken from real life:

sound_loud_speaker But, yeah, at that point I thought, “My God, I could be much more charming than Hugh!” (Rupert Everett, BBC4).

sound_loud_speaker There were sources that believed that they had a hand in Philip’s assassination (Paul Cartledge, BBC4).

sound_loud_speaker So, clearly, in a way, not much of a regular rythm there (Michael Rosen, OpenLearn)

 

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