  We introduced a measurement procedure for the involuntary response of voice
fundamental-frequency to frequency modulated auditory stimulation. This
involuntary response plays an essential role in voice fundamental frequency
control while less investigated due to technical difficulties. This article
introduces an interactive and real-time tool for investigating this response
and supporting tools adopting our new measurement method. The method enables
simultaneous measurement of multiple system properties based on a novel set of
extended time-stretched pulses combined with orthogonalization. We made MATLAB
implementation of these tools available as an open-source repository. This
article also provides the detailed measurement procedure using the interactive
tool followed by offline measurement tools for conducting subjective
experiments and statistical analyses. It also provides technical descriptions
of constituent signal processing subsystems as appendices. This application
serves as an example for adopting our method to biological system analysis.
