Audible breath which accompanies the articulation of certain types of sound. The consonant sounds in Mandarin Chinese can be grouped in aspirated (plosive) and non-aspirated (non-plosive). The aspirated consonants have a rather explosive pronunciation, while the non-aspirated consonants are more silent. The aspirated consonant sounds in Mandarin Chinese are written with "P", "K", "T", "C", "CH" and "Q" in Pinyin-transliteration. The non-aspirated counterparts to the same sounds are "B", "G", "D", "Z", "ZH" and "J". Please note that all these sounds are searchable with this very glossary!
Further reading:
Chinese phonetics