TABLE 1. Spectrum levels (re 20 μPa) of speech produced at normal conversational levels when the overall speech level is scaled to be 65 dB SPL, given as a function of center frequency (CF).

	Male					Female
CF, Hz	D&W	Pears	Arch	Byrne	This	D&W	Pears	Arch	Byrne	This
100	31.2		36.6	35.8	37.7			28.0	18.9	14.6
125	33.0	37.4	36.7	38.1	37.4	29.0	18.4	30.5	20.5	21.1
160	34.2	31.3	36.9	36.1	37.1	34.5	28.3	34.0	32.7	30.2
200	34.8	35.3	36.7	36.5	36.9	38.0	38.3	36.9	40.5	36.9
250	35.3	38.4	35.9	37.1	37.1	38.3	36.4	38.2	38.3	36.9
315	36.2	36.4	36.0	36.4	37.3	37.8	30.4	38.6	34.5	36.6
400	37.4	37.3	37.7	37.7	37.4	36.6	36.3	37.1	37.0	35.7
500	38.3	37.4	36.3	37.0	36.3	34.8	36.4	36.6	36.1	36.5
630	32.7	34.4	33.0	34.0	33.4	32.5	33.4	33.6	33.8	35.7
800	26.9	27.3	27.6	28.0	28.0	29.0	30.3	27.0	30.3	31.8
1000	26.3	25.4	24.0	24.5	23.2	26.4	25.4	22.0	25.7	27.2
1250	25.1	26.4	25.2	24.1	23.1	24.0	25.4	20.6	22.7	25.0
1600	22.2	22.3	24.5	21.6	22.1	22.0	23.3	18.4	21.0	24.4
2000	18.7	17.3	21.0	17.0	19.4	19.6	18.3	13.9	17.1	21.7
2500	15.5	17.4	19.2	16.3	17.9	13.5	15.4	11.8	14.7	19.4
3150	11.9	16.4	12.5	13.3	15.9	9.7	16.4	10.0	13.1	17.1
4000	6.1	12.3	10.2	11.3	11.2	9.1	17.3	10.7	10.6	13.4
5000	2.3	7.4	11.0	8.8	9.8	8.2	12.4	10.9	9.0	12.1
6300	0.3	7.4	8.6	6.7	7.3	6.2	11.4	13.1	8.6	10.8
8000	−3.8	3.3	9.5	4.7	5.7	2.7	8.3	15.1	7.2	9.0
10000	−8.8		7.2	3.3	1.5	0.0		10.6	6.4	6.1
12500	−12.9		−1.0	0.1	−4.4	−2.6		2.5	3.2	1.1
16000			−6.0	−0.3	−7.2			−3.9	0.4	−5.7

Data are taken from Dunn and White (1940) (D&W), Pearsons, et al. (1976) (Pears), the Archimedes CD (Arch), Byrne, et al. (1994) (Byrne), and the present study (This).