Bluetooth & Wireless devices

For the traditional loudspeaker or microphone we can make our basic tests of frequency analyses and distortion etc, by connecting to the transducers themselves (or at least their analogue interfaces). We term this system ‘closed loop’.

However, with audio devices such as Bluetooth headphones, the signal path for the test stimulus to the output or microphone input will be digital. Apart from the practicalities of accessing the actual test stimuli and response waveforms, the input and output signals will be asynchronous, i.e. originating from different clock sources, with potentially different sampling rates. Therefore frequency, phase and delay differences have to be processed before any analysis can take place. AcSoft offers whole system solutions for these open loop scenarios that include hardware interfaces for Bluetooth devices, MEMS, PIO and A2B.