Measure loudspeaker impedance with SignalScope X and DATS V2

This video shows how to measure loudspeaker impedance using SignalScope X and Dayton Audio’s DATS V2. It highlights SignalScope X’s MultiTool and Dual FFT Analyzer. First, the DATS V2 is configured and calibrated with its included 1kOhm resistor. Then, loudspeaker impedances can be measured and compared very quickly.

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Easy calibrated vibration measurements on Mac or iOS

Although Faber Mac and iOS apps have offered excellent sound and vibration analysis tools from the start, the introduction of the Digiducer 333D01 USB Digital Accelerometer makes vibration measurement easier and more portable. When the 333D01 is connected to a Mac, iPhone, or iPad, it will be immediately recognized by our apps and ready for calibrated measurements.

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Are you looking for a measurement microphone for your iPhone?

Some time ago, I was made aware of the i436 measurement microphone from MicW. It looked like exactly what was needed to turn any iOS device into a quality sound level meter, or acoustical analysis tool, that you could truly carry around in your pocket, but it was limited in its utility by that pesky low-end roll-off that plagued earlier versions of iOS.

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iPhone 5 audio consistent with iPhone 4S

Today, I had the opportunity to begin testing the audio input characteristics of the new iPhone 5. As seen in the plots, below, the headset input frequency response matches that of the iPhone 4S, which was presented in the previous post. The behavior of the built-in microphone also seems to match that of the iPhone 4S, suggesting that Apple kept the audio input path essentially unchanged in the new device.

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iPod touch 4 limited like iPhone 4

While built-in cameras and a microphone are exciting additions to the newest iPod touch, the same I/O limitations that plague the iPhone 4 as an audio/acoustics analyzer platform remain. In other words, the existing audio inputs on the 4th generation iPod touch suffer from significant low-frequency roll-off, just as the other iPhone and iPod touch models do. Also, existing analog line-level input accessories that worked with earlier iPod touch and iPhone devices (before the iPhone 4) are not compatible with the latest iPod touch. In spite of the present limitations, however, I’m sure it’s only a matter of time before suitable input options become available for the latest and greatest iOS devices…

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