Quantifying the audio performance of a device can be a challenge. From evaluating frequency response to THD+N (Total Harmonic Distortion + Noise), engineers designing and manufacturing audio-capable devices are tasked with determining the measurements to assess a device’s performance. An audio analyzer is an essential instrument throughout the development and production process, whether the device is a prototype IC or a newly manufactured smartphone. Measuring signals with precision and accuracy over a wide frequency and amplitude range, an audio analyzer, and its analysis software, provides insights into a device’s performance quickly.
Audio analyzers can be used for a wide variety of devices, applications, and industries. From serving an R&D department to validate and characterize a device’s performance, to providing a production line with pass/fail results across a plethora of parameters for the assembled product, the diversity of devices requiring audio evaluation—whether analog, digital or electroacoustic—is vast.
Audio Precision Audio Analyzers
The newest audio analyzer in AP’s portfolio, the APx500 Flex Audio Analyzer allows the user to choose an ASIO-capable audio interface (otherwise known as a “soundcard”) to pair with AP’s versatile and powerful audio measurement software, APx500. Users can customize their APx500 Flex instrument by both channel count and measurement options, with the ability to add individual measurements as needed based on their specific test requirements. Learn more about the APx500 Flex here. With APx500 Flex, manufacturers can cost-effectively deploy the measurement capabilities, flexibility and quality of APx software to their production lines.
Created for the production test application, the B Series APx515 is a two-channel audio analyzer, which provides agility, superb test automation options, reliability and straightforward operational procedures. For manufacturing environments, where turnaround time (TAT) is key, the APx500 measurement software’s ability to perform key audio measurements in seconds is a feature that pairs well with the APx515 analyzer’s performance: typical THD+N of –106 dB, 1.2M point FFTs and up to 216k digital I/O.
Bridging the gap between performance and an array of digital I/O options, the B Series APx52x is designed for engineers seeking an analyzer that combines two channels (APx525) or four channels (APX526) with fast and reliable test performance. Offering a modular chassis, the APx52x Series allows users to customize the instrument’s I/O to their specific needs. Available modules include PDM (Pulse Density Modulation), Bluetooth®, digital serial (I2S, TDM, etc.), HDMI and more. Engineers needing a higher-performance option should review the APx555, and those needing multichannel capabilities should evaluate the APx58x B Series audio analyzers.
Delivering multichannel capabilities, the APx58x B Series audio analyzers provide 8 simultaneous analog outputs and inputs. For engineers focused on the design of pro audio products such as mixing consoles, or those wanting to evaluate the performance of a home theatre receiver, the B Series APx586 adds a second input module. This provides 16 simultaneous analog input channels.
Unrivaled in performance by any other audio analyzer available, the APx555 is a two-channel instrument primarily designed for research and development engineers requiring the utmost in analog performance. This analyzer offers the same variety of digital I/O options as the APx52x and APx58x Series analyzers, utilizes the same capable and intuitive APx500 measurement software, while delivering the market-leading typical residual THD+N of – 120 dB.
For engineers who need an audio analyzer to evaluate a hearing instrument, the B Series APx511 Audio Analyzer provides the measurements and I/O vital to the production test process. Combined with AP’s signature performance and reliability, the APx511 can also be used in research and development, helping engineers evaluate a device’s signal quality.
There is a wide array of measurements available for the evaluation and characterization of a device’s audio performance. While measurement selection can vary depending upon the specific device and application, there are six measurements that tend to be fundamental and applicable to a majority of devices:
- Frequency Response
- Total Harmonic Distortion plus Noise (THD+N)
- SignaltoNoise Ratio (SNR)
To learn more about these measurements, and ways to improve your audio test procedures, read more on our blog: www.ap.com/blog/
Audio Precision brings over 35 years of innovation to audio test and measurement, manufacturing high-performance audio analyzers designed to evaluate audio signals, including analog, digital, and electro-acoustic devices. Learn more about audio analyzers and review our technical library and blog for further resources. Contact us with questions at [email protected]