ABR            Auditory Brainstem Response

AC               Air-conduction

BC               Bone-conduction

BSA             British Society of Audiology

CM              Cochlear Microphonic

CPG             Clinical Practice Guideline

C-R              Condensation- Rarefaction

CR                Clear Response

dBnHL         Decibels normal Hearing Level

GRADE        Grading of Recommendations Assessment, Development and Evaluation

Hz                 Hertz

Inc                Inconclusive

i/o                 input to output

NB                 Narrow Band

NHSP            Newborn Hearing Screening Programme (England)

nV                 nano Volt

PTA               Pure tone Audiometry

RA                 Response Absent

TB                 Tone Burst

TP                 Tone Pip

SNR               Signal to noise ratio

SPL                Sound pressure level