Hearing impairment, particularly the condition known as “hard of hearing,” affects a significant portion of the population. This article explores the characteristics, implications, and clinical assessments related to hard of hearing individuals, along with a detailed table on Rinne’s and Weber’s tests, which are essential for diagnosing types of hearing loss.
To assess hearing impairment, healthcare professionals often use various tests, including Rinne’s and Weber’s tests. These tests help differentiate between conductive and sensorineural hearing loss.
The following table summarizes the interpretation of Rinne’s and Weber’s tests, along with common causes of hearing loss associated with the results.
Test | Result | Interpretation | Common Causes |
Rinne’s Test | Positive (Air conduction > Bone conduction) | Normal hearing or sensorineural hearing loss | Normal aging, noise exposure |
Negative (Bone conduction > Air conduction) | Conductive hearing loss | Earwax buildup, middle ear infection, otosclerosis | |
Weber’s Test | Lateralizes to the affected ear | Conductive hearing loss in the affected ear | Earwax buildup, middle ear infection |
Lateralizes to the unaffected ear | Sensorineural hearing loss in the affected ear | Presbycusis, noise-induced hearing loss | |
No lateralization (hears equally in both ears) | Normal hearing or symmetrical hearing loss | Normal hearing, bilateral sensorineural loss |
Condition | History | Examination Findings | 1st Test | Other Tests |
Alport’s syndrome | fatigue, breathlessness, haematuria, renal failure, family history of sensorineural hearing loss, renal failure | systemic hypertension, normal otoscopic examination | » audiometry: high-tone sensorineural hearing loss » renal biopsy: features on electron microscopy | » molecular genetic testing: confirmation of linkage to COL4A5 or COL4A3/4 |
Jervell Lange-Nielsen syndrome | profound hearing loss from birth, parents may be unaffected, episodes of syncope | irregular pulse | » audiometry: sensorineural hearing loss » ECG: long QT syndrome | |
Waardenburg’s syndrome | parent may be affected, autosomal-dominant inheritance, hearing loss can affect one or both ears | wide flat nose, different-coloured eyes, white lock of hair, premature grey hair | » audiometry: sensorineural hearing loss » referral to geneticist: diagnosis of syndrome | » specific genetic test: detects Waardenburg’s syndrome |
Acoustic neuroma (vestibular schwannoma) | unilateral hearing loss, tinnitus, dizziness, nausea, unilateral facial weakness, known neurofibromatosis | normal otoscopic examination, may have abnormal gait | » MRI brain and internal auditory canal with gadolinium: uniformly enhanced, dense mass | » audiometry: sensorineural hearing loss |
Paget’s disease | known Paget’s disease affecting the skull, pain and deformity in other bones, or may be asymptomatic, more common aged >50 years, hearing loss may be unilateral or bilateral | normal otoscopic examination, Weber’s test lateralises to the opposite side | » audiometry: progressive sensorineural hearing loss, beginning with the high frequencies » alkaline phosphatase: elevated » plain X ray of long bones or skull | |
Granulomatosis with polyangiitis | rhinitis, nosebleeds, gingivitis and loosening of teeth, arthritis, eye pain, blurred vision, diplopia | skin: palpable purpura or petechial, nodular, vesicular, haemorrhagic, and ulcerative lesions | » urine sample: haematuria or proteinuria if there is renal involvement » audiometry: conductive or sensorineural hearing loss » anti-neutrophil cytoplasmic antibodies (ANCA): positive | » CT chest: lung nodules (may be cavitating) |
