Microphone Testing

Polar Plot (click to enlarge)

Polar Plot Option The polar plot analysis with the NTi Audio precision turntable complements the microphone measurement system to an all-in-one solution. The polar diagram displays the directional characteristic related to the measurement frequency of the microphone. For detailed analysis, the measurement angles might be set in arbitrary resolution down to less than 1°. The high-speed FX100 Audio Analyzer generates a series of fast sweep signals, covering the complete audio band from 5 Hz – 80 kHz, and turns the microphone to the configured angles between the sweeps. The measurement time halves by choosing the 180° mode, which mirrors the polar image. The polar plot graphics can be adjusted after the completed measurement, thus the microphone test system offers full flexibility for post processing.

1/2 Cycle PDM Interface for Digital MEMS Microphones The PDM interface box converts simultaneously the digital output signal of 8 digital MEMS microphones into individual analog audio channels. This accessory applies for applications with parallel testing of 8 MEMS microphones in an EOL production environment. The operation is controlled via USB from an external host computer. The PDM interface box provides 0 dBFS reference output signal for calibration and direct connections to digital I/O interfaces. The microphone supply voltage is adjustable. The Left/Right configuration of the microphone is controlled by the PC and the presence of any connected microphone indicated by LED's. Due to its small size, the PDM interface box can be located near the microphones under test, thus ensuring reliable operations with the short digital interface lines.

Measurement Microphone M2010 / M2015 The M2010 and M2015 are compact and accurate measurement microphones for acoustics, R&D and production. They are particularly suited for applications with restricted space available. Read more ... M2010 NTi Audio #: 600 040 010 M2015 NTi Audio #: 600 040 015

Precision Calibrator 94/114 dB, Class 1 The precision calibrator ensures accurate sound level measurements. It generates 94 or 114 dBSPL reference tones @ 1kHz for calibration of 1/2" and 1/4" measurement microphones (compatible to all NTi Audio microphones). NTi Audio #: 600 000 390 Download product data here.

Power Amplifier FA400 (2 channel) The FA400 is a high-performance 2-channel power amplifier tailored for audio test applications in R&D, sampling inspections and mass production. The two channels can be used independently or in bridged mode. Read more ... NTi Audio #: 600 061 000

Input Switcher IS-1002 IS1002 is an advanced, multi-functional audio input switcher with 10 input channels and 2 output channels, featuring individual power supplies for microphones on each input channel. Up to 8 input switchers can be cascaded for multi-channel applications totaling in 80 input channels. Read more ... NTi Audio: 600 010 425

Output Switcher OS-0210 OS-0210 is an advanced, multi-functional audio output switcher with 2 input channels and 10 output channels. Up to 8 output switchers can be cascaded for multi-channel applications totaling in 80 output channels. Read more ... NTi Audio #: 600 010 430