Welch Allyn Audioscope 3 Portable Screening Audiometer - User Manual - Manual (Page 9)

The process of threshold and bone conduction testing can be time-
consuming and costly in terms of equipment and personnel. Such
testing should be done in a soundproof room.
This is not practical for many people for detection purposes.
Therefore, many use a traditional audiometer but conduct a screen-
ing audiometric test.
Generally, screening is conducted at 20 dB HL, 25 dB HL or
40 dB HL using the speech frequencies (500 Hz, 1000 Hz,
2000 Hz, 4000 Hz). Individuals who fail to respond at one or
more frequencies in either ear are then referred.
This type of hearing screening is often done in school systems at
several grade levels and by speech-language therapists in private
practice. RARELY IS SCREENING PERFORMED IN OTHER NEED-
ED AREAS: in the physician’s office as part of a routine physical
examination; in each and every school grade; hospital admitting;
pediatric and ENT areas; nursing homes; high schools and col-
leges; industrial areas; public health clinics; and health mainte-
nance organizations.
The Welch Allyn AudioScope 3 provides a unique means for accu-
rate and efficient early detection of hearing loss.
AudioScope 3 provides screening at the speech frequencies of 1000,
2000, 4000 and 500 Hz respectively, at a fixed decibel level. Choices
of decibel levels include: 20 dB HL, 25 dB HL and 40 dB HL. Prior to
the screening tones a practice tone or pretone (PT) is delivered at
1000 Hz and at 20 dB HL above the screening level.
For example:
When Screening at: The 1000 Hz Pretone is set at:
20 dB HL 40 dB HL
25 dB HL 45 dB HL
40 dB HL 60 dB HL
The pretone allows the patient to hear a test tone at a level which
is more audible than the screening level itself, thus allowing for
practice.
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eening Audiometry
Screening Audiometry
WANM-3999-COL AudioScope3 3/11/97 1:23 PM Page 7