Frye FONIX 7000 User Manual

Page 122

Advertising
background image

114

FONIX 7000 Hearing Aid Analyzer

18. I/O curve selection box: the key to the I/O graph, listing which frequencies

go with which curve.

19. Attack and release measurements, including the frequencies at which they

were measured.

Test Result Differences with ANSI 96 and ANSI 87

• In ANSI 87 and ANSI 96, the response curve (2) is sometimes measured

at 50 dB SPL

• In ANSI 87, I/O (17) is only measured at 2000 Hz
• In ANSI 87, attack and release (19) is only measured at 2000 Hz
• In ANSI 87, AGC aids are measured at full-on gain for the entire test

sequence

• In ANSI 87, the OSPL90 curve is called SSPL90
• In ANSI 96, RSETS (15) is called STS-SPLITS
• In ANSI 87, the telecoil measurement (3, 14, 15) is much different. There

is only one measurement called “TCOIL 10 mA/m”

To delete the displayed results, press [F6] and use [∨, ∧] to select DELETE
ALL CRVS. Press [>] to perform the deletion.

5.1.7 Testing Digital Hearing Aids

The ANSI S3.22 “labeling” standard for hearing aids was not designed with digi-
tal hearing aids in mind. In fact, most of the testing methods employed by ANSI
have been around since the 1970s. However, since ANSI is a standard, in order
to conform to that standard, it must use only the testing techniques outlined in
the standard. For this reason, the 7000 test system has no provisions for incor

-

porating composite or digital speech into the ANSI test sequences.

In order to test digital hearing aids with “noise reduction” or “speech enhance-
ment” features to the ANSI standards, put the aid in “test” mode via its pro-
gramming software and do the steps outlined in Section 5.1.4. Contact your
manufacturer to get further suggestions on performing an ANSI 96 specification
test.

In order to get an accurate picture of the aid’s actual performance when it goes
home with your client, put the aid in the mode you will use for that client, and
perform response curve measurements in the coupler and in the real-ear via the
procedures described in Chapter 3 and Chapter 6 using the digital speech (DIG
SPEECH) signal source.

5.1.8 Viewing ANSI measurements in the Coupler screen

It’s possible to copy ANSI response curves to the Coupler screen where they can
be compared to other response curves. To do this:

Advertising