What is 'Deafness' or 'Hard of Hearing' (DHH)?
There are several terms that can and have be used to describe hearing loss: hearing impairment, deaf and dumb, deaf and hard of hearing, etc. The term 'hearing impairment' covers a broad range of hearing abilities from minimal hearing loss to those who have severe hearing loss or 'deaf'.12 Many members of the Deaf community dislike the use of the term 'hearing impairment' as it intends to cover such a wide range of hearing abilities under an umbrella term and fails to make known the distinctions between these groups.3 Deaf Australia suggests the use of terms such as 'deaf' or 'deaf or hard of hearing' (DHH) instead.4 Students who are deaf or hard of hearing cover a large range of hearing levels, from mild to profound,5 and this wide variety of Deafness is caused by a range of issues, including genetic conditions, ageing, trauma, or illnesses such as Measles, Hepatitis B etc.67 Deafness or hearing loss is a low incidence disability,8 but there is an increasing number of students who are deaf or hard of hearing who are being educated in mainstream, inclusive classrooms.9
Students who are deaf may have little to no verbal communication, depending on the age of which they lost their hearing and how severe their hearing loss is.10 This creates challenges for them in a classroom setting as they may miss out on information inputs due to their limited communication.
(Image retrieved from http://www.ntid.rit.edu/news/deaf-education-new-philosophy)
In order to teach students who are deaf or hard of hearing (DHH) effectively, it is important that as educators we understand how their deafness may have occurred and the different types of deafness that are prevalent in the student population. There has been research to suggest that because deafness is a low incidence disability, many educators know little to none about the origins and features of this disability.11 There are two main types of hearing loss: conductive and sensorineural. These types are dependent on the location in the ear from which the hearing loss originates. For students with conductive hearing loss, their deafness is in the eardrum and the outer/middle ear, and their hearing is often described as sounding like having fingers in your ears. On the other hand, sensorineural hearing loss is located in the inner ear.
(Image retrieved from http://www.myvmc.com/anatomy/ear/)
Some students may have a combination of both conductive and sensorineural hearing loss.12 Some students may have hearing loss in one of their ears, while others may have lost their hearing in both ears. Some students may have had hearing loss since birth while other students may have developed hearing loss. This range of circumstances means that as educators we must assess on an individual basis how to make a classroom more inclusive for a student who is deaf or hard of hearing (DHH).
1Strnadová, I. (2014). Persons With Sensory Impairments. Lecture, UNSW.
2Cawthon, S. (2009). Making decisions about assessment practices for students who are deaf or hard of hearing. Remedial and Special Education.
3 Australia, D. (2014). Terminology. Deafau.org.au. Retrieved 13 October 2014, from http://www.deafau.org.au/info/terminology.php
6Pubsites.uws.edu.au,. (2014). Hearing impairment or deafness | What is disability? | Education to Employment. Retrieved 13 October 2014, from http://pubsites.uws.edu.au/ndco/employment/what/hearing.htm
7Strnadová, I. (2014). Persons With Sensory Impairments. Lecture, UNSW.
8 Luckner, J. (2006). Evidence-based practices with students who are deaf. Communication Disorders Quarterly, 28(1), p 49
9 Stinson, M., Elliot, L., Kelly, R. and Liu, Y. (2009). Deaf and hard-of-hearing students' memory of lectures with speech-to-text and interpreting/note taking services. The Journal of Special Education, 43(1), p 52
10 Foreman, P. (2008). Inclusion in action (1st ed.). South Melbourne, Vic.: Thomson.
11 Marschark, M., Spencer, P., Adams, J., & Sapere, P. (2011). Evidence-based practice in educating deaf and hard-of-hearing children: teaching to their cognitive strengths and needs. European Journal Of Special Needs Education, 26(1), p 6
12 Schultz, J., Lieberman, L., Ellis, M., & Hilgenbrinck, L. (2013). Ensuring the success of deaf students in inclusive physical education. Journal Of Physical Education, Recreation \& Dance, 84(5), 51--56.