The current revision of the IPA chart (above) starts with a large table showing consonant sounds, or phones, made on a pulmonic egressive airstream (i.e., with air from the lungs). Place of articulation (POA) is indicated by which column a symbol is located in. The passive articulator is usually indicated, i.e., the part of the oral cavity which remains in place while the active articulator – often the tongue – moves towards it; e.g., if a sound is labelled “alveolar” it means the tongue moves towards the alveolar ridge. Manner of articulation (MOA) is indicated by row. Where voiceless and voiced pairs of consonants are given, the one on the left is voiceless. The usual way of describing a consonant is to use a VPM label, where VPM stands for “voice place manner” – so [t] is a voiceless alveolar plosive.