The 318 model simulates the acoustic characteristics of the outer ear of the human ear, and carries out acoustic measurement for the telephone receiver and earphone.
The simulation mouth is a sound source which simulates the sound field environment of the human mouth. It conforms to the international standard IEEE 269 and ITU-T rec. p51, and is usually used to test the frequency response of the microphone of the telephone and the communication microphone.
Model 711 is a device to simulate the acoustic characteristics of the ear canal, and to simulate the coupling of the earplug machine and the ear by inserting a catheter into the ear mold.
Electroacoustic software AX-ACO
The option of AX-ACO is selected for loudspeaker research and development/production line test, which mainly provides Acoustic Response test items and measures multiple parameters in one test to ensure the reliability of DUT. All tests include:
Subjective sound quality evaluation option AX-PESQ / POLQA2
Perceptual audio measurement is widely used in smart phones, VoIP networks and equipment testing to measure how people perceive sound quality. Perceptual sound quality testing is especially used for devices with limited bandwidth or bit rate. Using standard sine wave testing such as frequency response and distortion, these parameters cannot effectively test and compare the performance of different devices. Finally, only a combination of sensory and electrical audio testing can fully describe the performance of these devices. PESQ is a perceptual voice quality measurement tool developed by OPTICOM Co., Ltd. of Germany. According to ITU-T recommendations, PESQ is specially designed for testing voice quality on low-bandwidth devices, such as mobile phones and smart phones. Appropriate test signals can achieve results similar to those of human tests, with high correlation. POLQA2 strengthens testing to broadband voice quality and acoustic interface.
HDMI+Audio Return Channel (ARC) is a multifunctional option for audio monitoring and audio measurement. It is powerful, easy to use and accurate in measurement results. It can be widely used in audio quality testing of multimedia products. All standard audio measurements are available including level, SNR, distortion, phase, crosstalk, group delay, and others.
WIFI option AX-WIFI
Supported standards: WIFI 802.11 a / b / g / n Dual Band Ratio Support protocols: DLNA, AirPlay, QPlay
Bluetooth option AX-BT-RD / PT
AX-BT-RD is the most economical solution for Bluetooth audio testing. Its built-in Bluetooth wireless and Bluetooth protocol stack enables engineers to directly measure their Bluetooth devices, eliminate the uncertainty and inconvenience of Bluetooth dongle, and make Bluetooth audio test faster, simpler and more reliable. Applied to R & D testing.
Electroacoustic measurement software AX-SPK-RD / PT
It provides a series of comprehensive testing functions and results for the design and development personnel of electroacoustic products, including some key acoustic testing indicators, such as comprehensive Thiele-small parameters, time window controlled quasi-silent environmental acoustic response test, impedance analysis, etc. The AX-SPK-RD includes all test functions of the AX-SPK-PT.
Digital Bluetooth Adapter
Through the serial port of the computer, the communication between the tested product and the Bluetooth box is realized to realize the Bluetooth audio signal test.
The IMP2 Impedance fixture fulfills the role of sense resistor and is a convenient accessory when measuring impedance with an ABTEC Series analyzer. The IMP2 provides a choice of two sense resistors, with values of 1.0 Ω and 0.1 Ω respectively. Double-banana connectors on the rear provide connections for the driver and a power amplifier，and XLR connectors on the front of the fixture is connected with the analog input of the audio analyzer to detect the voltage of the inductive resistance and the voltage at both ends of the loudspeaker.
Class D Amplifier Measurement Filters
CAF2 switching amplifier measurement filter is a dual-channel multipole LRC passive low-pass filter, which can provide out-of-band attenuation of audio and reduce steep walls of the fast switching edge. Based on audio analyzer, CAF2 is also made into dual channels.
DB25-USB is a USB parallel port adapter. When audio switches SWF12, SWM12 and SWU12 are used, please provide DB25-USB adapter kit at the same time. It contains DB25 cable from L-COM Company of the United States, which can effectively restrain interference during parallel data transmission. DB25-USB, as a switching bridge, plays an important role in connecting computers, audio analyzers and SW12 series audio switches.
The system switching circuit of the 12-channel audio switcher adopts high-reliability electromechanical relays to maintain the integrity of the signal source and the input signals of the tested equipment. This series of products have excellent crosstalk characteristics, and the balance mode at 20KHZ is less than -150db. The signal interface control and switching operation of the audio switcher are integrated into ATC control software, and fast switching between corresponding channels can be observed from LED indicator lights.
DSIO option adds multi-channel digital serial interface for audio analyzer, which can provide direct connection for chip level interface and plays a decisive role in the design and development of circuit board. It is simple to use and accurate to test results. It can be widely used in audio quality test of various digital devices.