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The ALGO 7i hearing screener offers the user the option to screen both ears simultaneously, both ears
sequentially or each ear individually. This single technology device uses Natus’s patented AABR®
(Automated Auditory Brainstem Response) Screening technology to determine the status of the
hearing pathway from the outer ear up to the brain stem. The device offers an automatically created
result, which can have the values “PASS” (Clear Response), “REFER” (No Clear Response) or
“INCOMPLETE”.
The ALGO screener will issue a PASS result when it collects sufficient data to establish with > 99%
statistical confidence that an ABR signal is present and consistent with the template. This confidence
level can be reached at a minimum of 1000 sweeps for 35dBnHL screening, and 2000 sweeps for
40dBnHL screening. The ALGO screener will continue to collect data up to 15,000 noise-weighted
sweeps. If it has not established with > 99% statistical confidence that the ABR signal is present after
15,000 noise-weighted sweeps, it will issue a REFER result.
The ALGO 7i hearing screener uses patented signal processing technology to separate the ABR from
background noise and other brain activity. These responses are matched against a stored pattern
called a “template”, derived from the ABRs of normal-hearing infants. The ALGO screener must detect
the ABR with very high statistical confidence in order to issue a PASS result. The ALGO technology
includes a patented dual-artifact rejection system to prevent non-ABR activity from contributing
toward a PASS result. This ensures a very high degree of accuracy of the PASS result issued by an ALGO
device.
The ALGO 7i has no essential performance as related to DIN EN / IEC 60601-1.
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