1. Iannacci F, Huang Y (2015) ChirpCast: data transmission via audio
2. G Elert. 44, 1999 (2003) Frequency range of human hearing. C D’Ambrose. The Physics Factbook, 43
3. Androutsellis Theotokis S, Spinellis D (2004) A survey of peer-to-peer content distribution technologies. ACM Comput Surv 36(4):335–371
4. BBC Article Page, https://www.bbc.com/news/technology-53146360. Last Accessed 2020/09/25
5. Dailt Mail Article, Google Tez uses ultrasonic sound for data transmission, https://www.dailymail.co.uk/sciencetech/article-4896748/Google-Tez-payment-app-uses-ultrasonic-sound.html#:~:text=Google%20has%20unveiled%20a%20new,heard%20by%20t