Voice bar spectrogram

1. What is a voice bar on a spectrogram?
2. What does aspiration look like on a spectrogram?

What is a voice bar on a spectrogram?

The term “voice bar” is commonly used informally in phonetics, and normally refers to the dark (high amplitude) “bar” resembling a formant at a very low frequency (150-200 Hz) in wideband spectrograms of voiced sounds.

What does aspiration look like on a spectrogram?

Aspiration will look like a period of [h] between the blank gap and the vowel -- specifically, a voiceless version of the following vowel. (Recall that the tongue body is in position for the following vowel and that aspiration is just a delay in the onset of voicing.)