Download Manual for the Ares Frequency Response Measurement Module

Pressing Calculate STMR will compute the STMR value.
Example 2
Hoff is non-zero and MRP microphone is in place.
Example 2 will be assumed to be similar to Example 1, except that this time the Hoff path is nonzero. In this case, the use “unit turned off” transfer function to correct for direct MRP to ear
audio path option is checked and the H2off transfer function is specified in the Data set w unit
turned off and its associated transfer function list box.
Assume that the H2off data resides in a data set with the name “Pdrp / Pmrp off” and the H2on
data resides in a data set with the name “Pdrp / Pmrp on”. Since the MRP and DRP microphone
were both analog voltages, they could both be recorded simultaneously with the left and right
inputs. The DRP microphone was put onto the left channel, and the MRP microphone was put
onto the right channel.
Again, it’s assumed that we’re using narrow band data, so wide band audio is unchecked.
The STMR dialog box controls will be set as shown below. Pressing Calculate STMR will
compute the STMR value.
Example 3
Hoff is non-zero, and MRP mic is removed for DUT to be in place
In this example, the MRP microphone must be removed in order for the DUT to be put in place
on a HATS so the H1 transfer function of PMRP/VAM must be measured, and then the subsequent
measurements H2off and H2on will be PDRP/VAM with the unit off and on, respectively.
The H1 transfer function PMRP/VAM is specified by:
- enabling use output voltage to MRP pressure reference transfer function
- specify the name of the data set containing the H1 in the Data set w output to MRP xfer fn list box
- specifying which transfer function in the Output to MRP transfer function list box
Copyright 2012, 2013 McIntosh Applied Engineering, LLC
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