Research Article
A Disembarking Notification Application for Public Transportation Using Inaudible Frequency
Table 1
Matching bus stations and a pair of high frequencies for each bit data.
| | Bit data | Bus station | Inaudible frequencies | Station no. |
| | 00 | Seoul National Univ. | 18.0 kHz and 18.7 kHz | 01 | | 01 | Nakseongdae Stn. | 18.0 kHz and 18.8 kHz | 02 | | 02 | Bongcheon Sageori | 18.0 kHz and 18.9 kHz | 03 | | 03 | Bongcheon Stn. | 18.0 kHz and 19.0 kHz | 04 | | …… | …… | …… | …… | | 0D | Airforce Club | 18.0 kHz and 20.0 kHz | 14 | | 0E | Incheon International Airport Terminal 1 | 18.1 kHz and 18.8 kHz | 15 | | 0F | Incheon International Airport Terminal 2 | 18.1 kHz and 18.9 kHz | 16 |
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