Charge is at a maximum when the voltage is zero, and voltage is at a maximum when the charge transfer is zero. Open-circuit voltage, Vo, refers to the voltage developed, at the maximum recommended stress level, when charge is prohibited from traveling from one electrode to the other.
Short-circuit charge, Qs, refers to the total charge developed, at the maximum recommended stress level, when the charge is completely free to travel from one electrode to the other, and is not asked to build up any voltage.
To upgrade to full professional results, use our iTestMic, or iAudioInterface2 with any test & measurement microphone.Īlso see our other great audio test and measurement apps.Piezoelectric generators are usually specified in terms of their short-circuit charge and open-circuit voltage. Smaart Tools RTA Spectrum works great with the built-in iOS device microphone, as we have proprietary microphone compensation and calibration database derived for every iOS device. Check out the screenshots to see if your device supports them. On iPad and larger iPhones, split graph mode is available, so that you can put any two graphs on the screen at the same time. All settings are automatically saved and restored the next time that you run the app. Other features include high-contrast mode, variable Spectrograph speed, vertical or horizontal running Spectrograph, Difference mode, Peak Tracking, and FFT Windowing.Īll of the standard AudioTools features, such as Save / Recall and the Generator Panel are available. Real-time Spectrograph history is saved, just swipe to see sound events that have scrolled off the screen. Double-tap the screen to return to full frequency response, and to auto-scale the dB scale. The frequency scale can be zoomed down to a single octave, and the dB scale can be zoomed down to 1dB resolution. The decay modes from Smaart® v.7 are also available, and include None, 1, 2, 4, 8, and 16 averages, and the Smaart 1-10 second custom decay settings, as well as Infinite, Fast, and Slow. On the iPhone and iPod touch, there is an additional graph, the Spectrograph with the RTA Line graph on top of it.Īll of the RTA banding options available in Smaart® v.7 are available, including log, lin, Octave, 1/3rd, 1/6th, 1/12th, 1/24th and 1/48th Octave modes. The single-channel module includes the following features from Smaart® v.7: the RTA Bar graph, RTA Line graph, RTA Bar & FFT graph, and the Spectrograph. Now, you can have the sophisticated analysis of Smaart® on the iPhone and iPod touch mobile platform. Smaart Tools was developed by Studio Six Digital in collaboration with Rational Acoustics and is based on the proprietary algorithms, techniques, features & color mapping found in the Smaart® v.7 acoustic test and measurement software. If you need a two-channel FFT for your iOS device, check out Transfer Function, a module in our AudioTools app. SmaartTools for iOS single channel RTA is a full-featured audio spectrum analyzer based on the single-channel portion of Smaart 7 by Rational Acoustics.