The National Instruments PXI-4496 is a high-accuracy data acquisition module specifically designed for high-channel-count sound and vibration applications. With 16 simultaneous channels in a single PXI module, it is twice the density of any other simultaneously sampled device from NI. When you use the NI PXI-4496 in an 18-slot PXI chassis, you can synchronize up to 272 channels. And because the module is programmed with NI-DAQmx featuring DAQmx Channel Expansion functionality, data acquisition code is the same for one channel, 16 channels, or 272 channels. For even larger noise mapping microphone arrays, dynamic structural test, or data streaming applications, you can synchronize more than 13,000 channels in a multichassis PXI system. The PXI-4496 module features a maximum sampling rate of 204.8 kS/s per channel and includes TEDS smart sensor support for error-free setup.
Signal Connectivity NI 449x devices have two 4X InfiniBand connectors, with each carrying eight input channels, AI0-7 and AI8-15. The 4X InfiniBand is widely used in high-performance computing applications because it provides excellent signal integrity with a shield plate between input signal pairs. NI offers a variety of cabling options including a shielded breakout cable with eight BNC connectors and a 19 in. rack-mountable adapter with 32 BNC connectors.
Best Value: Buy Hardware and Software Together The PXI-4496 is also available as a bundle with the NI Sound and Vibration Measurement Suite, which includes NI Sound and Vibration Assistant, at a discount from the list price.
Recommended Software PXI-4496 modules are programmed with NI-DAQmx and are optimized for use with the NI Sound and Vibration Measurement Suite. The NI Sound and Vibration Measurement Suite provides signal processing functionality for performing audio measurements, fractional-octave analysis, frequency analysis, transient analysis, and order tracking. For an interactive software experience, NI Sound and Vibration Assistant can quickly acquire, analyze, and log acoustic, noise, and vibration data.
Consumer demand for next-generation multimedia devices such as set-top boxes, Blu-ray players, HDTVs, gaming consoles, and mobile devices is challenging engineers to get these devices to market faster. National Instruments provides a wide range of measurement and automation tools built on flexible, industry-proven platforms that can help engineers meet this challenge from multimedia device design to production. Register for each event to learn how engineers are testing the latest audio standards
Multimedia Device Test Web Event Series March 23-25, 2010
Top Five Measurements for Audio Test Applications
Audio measurements can analyze a wide variety of abnormalities in a signal. The basis of audio analysis is choosing appropriate levels and performing frequency analysis on data acquired from a device. Step through the basics of audio signals and learn how to set up a system to take measurements such as total harmonic distortion (THD) and signal-to-noise ratio (SNR).
View the Webcast Tuesday, March 23, 1:00-2:00 p.m. CDT:
Cleaning Audio Signals: Filtering and Signal Processing
Engineers face two major challenges in audio test: audio signals are inherently noisy and the measurements are always performed in the frequency domain. Weighting filters and windowing functions are two of several techniques you can use to achieve a proper understanding of your audio signals. Learn different filtering techniques to obtain more reliable results while testing your audio device.
View the Webcast Wednesday, March 24, 1:00-2:00 p.m. CDT:
Sound quality analysis is based on the field of psychoacoustics. Sound quality algorithms define how humans perceive the sound they are analyzing. Learn how to determine if your sound is too sharp, loud, or rough.
View the Webcast Thursday, March 25, 1:00-2:00 p.m. CDT:
