RECD

This section discusses the application of RECD in the different measurements in the ACAM System.

The RECD measurement is used to simulate a real ear measurement. The <rem> button must be enabled in the ACAM System in order to see the <recd> button. For the recording of RECD, please refer to the section: “miscellaneous/simulation/RECD.”

There are two possibilities available for calculating RECD:

A direct measurement using the <recd> button
An indirect measurement by converting from test box and/or real ear curves, which is found in the curve info window.

The RECD button knows 3 different conditions:

Figure 116: RECD button disabled

The <recd> button is disabled (Figure 104).
RECD cannot be enabled and no measurement can be transferred to the test box.
It is necessary to first perform a RECD measurement.

Figure 117: RECD button enabled, but not selected

The <recd> button can be clicked if it is enabled (Figure 117).
If a measurement started, it is a real ear measurement.
The data is not yet transferred to the test box.

Figure 118: RECD button enabled and selected

Click the <recd> button to enable the measurement (Figure 118).
The measure can be performed in the text box, but not real ear.
However, the results are displayed in the real ear screen.

Additional Notes:

When a RECD measurement is available, select between the normal real ear measurement (button not pressed) and transfer data to the test box (button is pressed).
The RECD measurement is available for the right and left side.
All measurements available in the real ear measurement can also be performed or transferred (i.e. in the test box).
The calculation procedure: Real ear measurement value = test box measurement value + RECD measurement value.
Enable the calculation above in the curve information (Refer to the section: “Display and administrate curves.”

Figure 119: Curve info for test box

The Figure 119 shows the curve information in the test box.

Click <Convert into in situ curve> to create a new curve seen in the real ear curves.

Figure 120: Curve info for real ear

Figure 120 shows the curve information in real ear.

Click <Convert into test box curve> to calculate the curve as a test box curve (using the RECD data). This curve will be displayed in the test box (<HIT> button).