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Recruitment Test

Recruitment test. A sound of a particular intensity becomes abnormally loud and intolerable to the patient. The low magnitude intensity sounds cannot be heard in the affected ear, it begins to hear high intensity sounds as loud or even louder than the normal hearing ear. Recruitment is commonly seen in patients with cochlear dysfunction. Such patients are poor candidates for hearing aids. 

Recruitment test Recruitment test Recruitment test Recruitment test

Alternate binaural loudness balance test is done to detect recruitment in unilateral cases. A tone, say of 1000 Hz, is played alternately to the normal and the affected ear and the intensity in the affected ear is adjusted to match the loudness in the normal ear. The test is started at 20 dB above the threshold of deaf ear and then repeated at every 20 dB rise until the loudness is matched or the limits of audiometer reached. In conductive and neural deafness, the initial difference is maintained throughout while in cochlear lesions, partial, complete or over-recruitment may be seen 

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Learning resources.

  • Scott-Brown, Textbook of Otorhinolaryngology Head and Neck Surgery.
  • Glasscock-Shambaugh, Textbook of  Surgery of the Ear.
  • Logan Turner, Textbook of Diseases of The Nose, Throat and Ear Head And Neck Surgery.
  • Rob and smith, Textbook of Operative surgery.
  • P L Dhingra, Textbook of Diseases of Ear, Nose and Throat.
  • Hazarika P, Textbook of Ear Nose Throat And Head Neck Surgery Clinical Practical.
  • Mohan Bansal, Textbook of Diseases of Ear, Nose and Throat Head and Neck surgery.
  • Anirban Biswas, Textbook of Clinical Audio-vestibulometry.
  • W. Arnold, U. Ganzer, Textbook of  Otorhinolaryngology, Head and Neck Surgery.
  • Salah Mansour, Textbook of Comprehensive and Clinical Anatomy of the Middle Ear.
  • Susan Standring, Gray’s Anatomy.
  • Ganong’s Review of Medical Physiology.


    Dr. Rahul Bagla ENT Textbook

    Dr. Rahul Bagla
    MBBS (MAMC, Delhi) MS ENT (UCMS, Delhi)
    Fellow Rhinoplasty & Facial Plastic Surgery.
    Designation: Faculty, Associate Professor
    Government Institute of Medical Sciences,
    Greater Noida, India