Powerful Measurement Algorithms
SoundCheck® incorporates specialized algorithms which improve the measurement process, including STWEEP™ and HarmonicTrak™.
STWEEP™
Typically a digitally generated stepped-sine excitation will contain discontinuities because the frequencies do not change at a zero phase and amplitude crossing. By using an integer number of cycles at each frequency step, the STWEEP ensures that transition from frequency to frequency is always smooth. This ensures significantly less transducer settling time and results in faster and more accurate measurements.
HarmonicTrak™
Unlike many measurement systems that use a notch filter to measure distortion and noise, SoundCheck utilizes a proprietary algorithm that measures the distortion separate from the noise. HarmonicTrak can measure any number of harmonics simultaneously including sub-harmonics.
With its advanced filtering algorithms, HarmonicTrak excludes the contribution of the fundamental and the noise in between the harmonics (vertical red lines). Thus harmonic distortion, including high-order harmonics present in rub & buzz, are measured accurately and not buried in background noise.
THD+N approach can overestimate transducer distortion
HarmonicTrak rejects background noise thereby measuring the actual distortion