AUDIOMETRY

Effective Date: 
Sun, 12/01/2002
Reviewed: 
Fri, 08/19/2011
Revised: 
Mon, 09/09/2013

SUBJECT: AUDIOMETRY PROCEDURE

PERSONNEL: RN, LVN, MA

EQUIPMENT: AMBCO 650A AUDIOMETER

PROCEDURE:
Personnel shall check the audiometer for AC power supply and make certain all parts are in good working order. Provide a quiet environment.

Threshold Testing:

  • Confrm patient orders and note ordering clinician in EMR entry.
  • Arrange audiometer so that the patient is unable to visualize operation of the equipment.
  • Turn the audiometer on.
  • Press tone, red ON light indicates power is on.
  • Use audiogram test blank for documentation and transcribe results into EMR post-testing.
  • Select the RIGHT EAR to be tested first. Allow patient to select preferred tone: steady or pulsed tone.
  • Set frequency to 500 Hz and the HTL (intensity) to 40 dB.
  • Explain the procedure to the patient: You will present tones to the left or right ear and he/she will respond when the tone is heard by pushing the patient response switch every time a tone is heard.
  • Place the headband and receivers on the patient. Place the RED receiver over the right ear and the BLUE receiver over the left ear. Make certain the headband and receivers are tight but comfortable.
  • Demonstrate the sound to the patient by pressing the TONE for approximately 1-2 seconds and asking them to respond to the test tone. A display above the TONE, ON, lights up when tone is presented. When the patient response switch is pressed by the patient, the green RESPONSE light comes on, indicating the tone was heard.  Record the patient's response at the following three intensities, tested in this order: 40 dB, 25 dB, and 10 dB. 
  • Follow the above procedure for the following frequencies, to be tested in this order: 500 Hz, 1000 Hz, 2000 Hz, and 4000 Hz.
  • Switch the selector switch to the other ear and repeat the exact procedure. (It is best to test one ear at all required frequencies and intensities,  then switch to the other ear.)
  • Clean equipment after each patient use per manufacturer instructions

DOCUMENTATION AND FOLLOW-UP

  • Document results in EMR for clinician review.

WHAT IS NORMAL HEARING?
Generally if a person can hear as low as 25 dB at the test frequencies his/her hearing is considered acceptable.

AUDIOMETER MAINTENANCE

  • On an annual basis, the audiometer is professionally calibrated and any necessary repairs are made. This is usually done in the summer by returning it to the company.