Research in Experimental Phonetics and Linguistics 2: 32-43 (2010) N4a N4a P2 normal normal normal 1. 1.1 1999 (1996) 1 1.2 (2008) (ibid.) * 2009 8 8 1 (ibid.) 32
(1999) 2 1.3 N4a ERP N4a 3 ( 2005) 4 2. (2009) 3. 3.1 B613 3-1 2 [papapa] [pa papa] Pz P300 3 (2009) 4 33
3.1 3.1.1 5 ECI-2 (Electro-Cap International ) 10-20 6 F3 F4 C3 C4 P3 P4 O1 O2 F7 F8 T5 T6 Fz Cz 14 ( 3-2 ) electro-gel (Electro-Cap International ) NEC ELECTRODE BOX TYPE 6R12-2 NEC BIOTOP 6R12-2 0.5Hz 60Hz 50 V/fs PC98xv20 (OS NEC98 MS-DOS6.1) EPLYZER2.1 ( ) 500Hz -100msec -100 1948msec 35 5 6 10 10 20 ( 1997:248) 34
3.2 3.1.2 7 IBM Vision PS/V Model 2408 (OS Windows3.1) Winstim ( ) 3000msec Technics Stereo Cassette Desk RS-678U Technics Stereo Flat Preamplifier SU-9070 Technics Stereo Universal Frequency Equalizer SH-9010E Technics Peak/Average Meter Unit SH-9020M Technics Stereo Power Amplifier SE-9060 ( ) 65dBSL 8 ( NL-14 ) Technics Linear Phase Speaker System ( ) 3.2 3 SM 19 OE 19 HY 20 7 8 SPL (sound pressure level) SL (sensation level) 2 0.00002Pa 0Hz SPL SL ( 2005:458) ( 2001:34) 35
3.3 [papapapapa] 9 (fast normal slow) normal (up down) 5 KR 24 3.1 3.3 3.4 Speech Analyzer Ver.1.07 3.1 fast 590 233 266 33 normal 720 203 231 28 slow 960 217 241 27 up 730 228 429 201 down 740 211 376 165 ms (Hz) 3.3 (fast normal slow) 9 /p/( 1989) /a/( 1997) 1000ms slow 1000ms 5 36
3.4 (normal up down) 3.4 10 3000 ms 35 11 35 3.5 12 (EPLYZER) RAW 13 ATAMAP 14 15 3.6 (PL 16 ) 10 fast slow up down 11 40 12 13 14 15 16 Peak Latency 37
4. 4.1 (PL) 4.1 N1 P3 17 N4a 4.2 4.1 N1 P3 4.2 N4a 5. N4a ( 4.2 ) HY slow OE fast N4a 17 ( ) ( ) ( ) 38
18 SM N4a SM N4a (1997 :256) 700ms N4a N4a up down OE 700 ms N4a ERP N4a N4a N4a 3 P2 5.1 P2 fast normal slow P2 up normal slow (up normal slow) 18 OE fast HY slow P4 39
5.1 P2 ( 5.1) SM normal fast slow KM (3 ) 19 P2 normal ( 4.1 ) HY N2 (normal 20 ) normal fast slow normal (fast slow) P1 N1 P2 P2 ( ) OE HY normal normal normal (up down 21 ) ( 19 20 normal normal normal 21 down down normal normal down up down down 40
5.1 ) NN KM 22 normal SM KM3 normal < normal normal normal (2008) 23 6. (1996) NLC96-38, SP96-69 1-8. (1997) (1999) 28 9 44-50. (2005) 16 (2001) (1989) 5 3-1 135-136. (2008) 191-209. (2008) ( ) 70-85. (2009) 147-159. 22 KM (KM1) up down 23 41
(1999) 28 9 40-43. 42
Brain Waves Experiment about the Perception of Speech Rate Ayumi MARUSHIMA The purpose of this study is to discuss the effect of speech rate in the cognitive process of speech sound. To serve this purpose, we observed the features of ERP elicited by listening to nonwords with various speech rates and different pitch patterns. Three kinds of speech rate were used: fast, normal, and slow. Two kinds of pitch patterns were also chosen: up and down. Three Japanese participated in this experiment. As a result, when the subjects listened to nonwords at the normal speech rate, the peak latency of the P2 tended to advance in comparison to nonwords at fast or slow speech rates. Moreover, when the subjects listened to nonword with a flat pitch pattern (normal), the peak latency of the P2 also tended to advance in comparison to nonwords with an up or down pitch pattern. Doctoral Program in Literature and Linguistics University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan E-mail: ayumi_marushima@yahoo.co.jp 43