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129 results:
Graph Trace Colors in AP2700 and ATS  
… in the cycle. The color assignment pattern is illustrated in the chart below. The last two columns show the colors that will be assigned if you do a typical two-channel sweep, either by setting up Data 1 and…  
APx Waveform Computes Utility  
… invoked to run in the background by adding a Run External Program step in the project navigator, as shown in Figure 3. Fig 3  AV Sync Run External Program Step. A controlled test file with…  
Equalizing APx Generator .wav Files for PESQ  
… EQ curve, and an output file. Some sample .csv files are included with the utility as examples to show the proper format. The data export feature in APx will also create a properly formatted .csv files. …  
APx API Programming Best Practices  
… objective is to create a simple application that opens the APx control software and has buttons to show or hide the APx GUI, open a specific APx Project file, and run the APx measurement sequence defined in…  
PESQ Perceptual Audio Testing with APx  
… similar to full reference. PESQ uses the full reference method to evaluate voice quality, as shown in the block diagram below. Fig 2PESQ block diagram (courtesy of OPTICOM GmbH). PESQ In APx500 …  
Setting Up and Making Acoustic Response Measurements with APx  
… from the results. These are the energy time curve (ETC) and the impulse response (IR). Both show the sound pressure level at the microphone as a function of time. As can be seen, the initial arrival of…  
APx500 Tips: Derived Results  
In this post, we discuss Derived Results in the APx500 software, another useful capability to help satisfy your audio test needs.  
Measuring Complex Impedance with AP2700 Series Instruments  
… it. This makes the SYS-2722 ideal for making audio-frequency impedance measurements. This article shows how to make impedance measurements using SYS-2722, a test jig, and a supplied macro. The jig can be…  
Waterfall (CSD) Plots with APx  
… to the desired position. As the cursor is dragged, the value in the Time Window indicator updates to show the time window cursor position. Figure 2. The specify time window dialog. The time window cursor…  
The Complete Mic Test Solution  
TELEFUNKEN Leverages Audio Precision Technology for its New Microphone Testing Lab  
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