How to pronounce [m]
Form a complete closure by pressing both lips together and then allow the air to pass through the nasal cavity while vibrating the vocal cords. The sound of [m] is similar to the “m” in the English word “mom.”
How to pronounce [f]
Lightly place your top front teeth against your lower lip and push air through the narrow gap without voicing. The sound of [f] is similar to the “f” in the English word “fan.”
The Similarities
[m] and [f] are both consonant initials in Mandarin pinyin.
Both are produced at the front part of the mouth (labial area).
The Difference
[m] is a voiced bilabial nasal sound, allowing air to pass through the nose with vocal cord vibration.
[f] is a voiceless labiodental fricative sound, produced without nasal resonance or vocal cord vibration.
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