The Improving Effect of Intelligent Speech Recognition System on English Learning

Table 1

Filter bandwidth parameter table (frequency: Hz).

Serial number	Center frequency	Bandwidth	Lower limit frequency	Up and down frequency
1	50.0	80.0	20.0	100.0
2	150.0	100.0	100.0	200.0
3	250.0	100.0	200.0	300.0
4	350.0	100.0	300.0	400.0
5	450.0	110.0	400.0	510.0
6	570.0	120.0	510.0	630.0
7	700.0	140.0	630.0	770.0
8	840.0	150.0	770.0	920.0
9	1000.0	160.0	920.0	1080.0
10	1170.0	190.0	1080.0	1270.0
11	1370.0	210.0	1270.0	1480.0
12	1600.0	240.0	1480.0	1720.0
13	1850.0	280.0	1720.0	2000.0
14	2150.0	320.0	2000.0	2320.0
15	2500.0	380.0	2320.0	2700.0
16	2900.0	450.0	2700.0	3150.0
17	3400.0	550.0	3150.0	3700.0
18	4000.0	700.0	3700.0	4400.0
19	4800.0	900.0	4400.0	5300.0
20	5800.0	1100.0	5300.0	6400.0
21	7000.0	1300.0	6400.0	7700.0
22	8500.0	1800.0	7700.0	9500.0
23	10500.0	2500.0	9500.0	12000.0
24	13500.0	3500.0	12000.0	15500.0