/k/ in sə 1 .kop 4 , for 'coat' Voiced Nasal Velar Plosive /ŋ/: The F2 and F3 formants are shown to be closing in the spectrogram below. This aspect differentiates the velar nasal plosive from other nasals. The main properties of nasals are captured in this spectrogram, i.e. the low F 1 (sometimes called the nasal formant), close spacing between the formants, the presence of anti-formants, and the presence of anti-formants, whose frequencies are determined by the place of articulation of the stop.