问题：
Distinctive features of speech sounds
答案：
The distinctive feature is a property which distinguishes one phoneme from another. For example 'voicing' is a distinctive feature since it plays an important role in distinguishing obstruents in English. Thedistinctivefeatureisapropertywhichdistinguishesonephonemefromanother.Forexample,'voicing'isadistinctivefeature,sinceitplaysanimportantroleindistinguishingobstruentsinEnglish.