World Health Organization. Deafness and hearing loss. Retrieved on 9th November 2020 from https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss.
Low WK. Managing hearing loss in children and adults in Singapore context. Retrieved on 17th November 2020 from https://www.annals.edu.sg/cpdMay05.html.
Hear-it.org. Consequences of hearing loss. Retrieved on 9th November 2020 from https://www.hear-it.org/consequences-of-hearing-loss-2.
NCBI Bookshelf. Hearing loss and deafness: normal hearing and impaired hearing. Retrieved on 17th November 2020 from https://www.ncbi.nlm.nih.gov/books/NBK390300/.
Centres for Disease Control and Prevention. Too loud, too long. Retrieved on 9th November 2020 from https://www.noisyplanet.nidcd.nih.gov/.
National Hearing Care. How do I know I have a hearing problem? Retrieved on 9th November 2020 from https://nhc.com.au/hearing-loss/signs-and-symptoms.
Medline Plus. Hearing tests for adults. Retrieved on 15th November 2020 from https://medlineplus.gov/lab-tests/hearing-tests-for-adults/.