Abstract
PIPS (Portable Instrumental Phonetics Station) is a portable box designed for gathering and analyzing aerodynamic and other phonetic data in the field. It contains two pressure transducers mounted 10 cm apart in a single tube with accompanying amplifiers, a high-speed chart recorder, a Rothenberg airflow measurement system, and a miniature storage oscilloscope. Circuits constructed at UCLA provide (1) preamplification to strengthen weak signals, (2) amplification to drive the chart recorder galvanometers (3) rms energy envelopes of ac signals, and (4) FM modulation and demodulation that can record and play back one channel of relatively high-frequency data or two channels of low-frequency data on a single track of a portable tape recorder. An experimenter normally uses the other track of a stereo tape recorder for an audio recording, although the two types of FM encoders can be used simultaneously to provide up to three channels of FM recording on a stereo tape recorder. Rechargeable batteries can drive most of the circuits. At present, the PIPS has been used in the U.S., China, and the Southern Sudan. [Work supported by NIH and NSF.]
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call