Measures of timbre – spectral slope
		Spectral slope: measures relative amounts of high (2-5 kHz) and low (0.5-2 kHz) power. Expected sensitivities: • Soft(-) ÛHarsh(+), • Modal(-) Û Breathy(+) • Voiced(-) Û Fricative(+) • Low subglottal pressure(-) Û High subglottal pressure(+)