1. Hearing Link (2011) Facts about deafness and hearing loss.
https://www.hearinglink.org/your-hearing/about-deafness-hearing-loss/facts-about-deafness-hearing-loss/
. Accessed 17 July 2017
2. Chisolm TH, Johnson CE, Danhauer JL, Portz LJP, Abrams HB, Lesner S et al (2007) A systematic review of health-related quality of life and hearing aids: final report of the American Academy of Audiology Task Force on the health-related quality of life benefits of amplification in adults. J Am Acad Audiol 18(2):151–183
3. Bansal M (2013) Disease of the Ear Nose and Throat. JP Medical Limited, New Delhi, pp 55–82
4. Ali W, Suebwongpat A, Weston A (2008) The effectiveness of digital hearing aids and assistive listening devices for adults with hearing loss: a systematic review of the literature. HSAC Rep 1:4
5. Hussain MSSM (2008) Conductive hearing loss, Nottingham, pp 3–7. Retrieved from
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/384492/conductive_hearing_loss.pdf
. Accessed 6 Aug 2017