Company Filing History:
Years Active: 1977
Title: Arnold Frisch: Innovator in Hearing Protection Technology
Introduction
Arnold Frisch is a notable inventor based in Portland, OR (US), recognized for his contributions to the field of acoustical testing. He has developed innovative solutions aimed at enhancing the effectiveness of hearing protection devices. His work is particularly significant in environments where hazardous noise levels are prevalent.
Latest Patents
Frisch holds a patent for an "Apparatus for testing acoustical attenuation of hearing protectors." This portable device is designed to determine the effectiveness of various personal hearing protectors in attenuating hazardous noise. The device features an electronic circuit that generates audio test signals at varying amplitude levels. It includes a display that provides numerical indications to measure the differences in amplitudes between the respective audio signals. The test signal can be adjusted in loudness using a subject-operated hand switch, which also triggers the display of the appropriate numerical indication based on the individual's subjective assessment. The device is capable of producing complex, multifrequency test signals with preweighting to emphasize potentially hazardous frequencies. Specially designed earcups with audio transducers are included for testing earplug effectiveness in ambient noise environments. The device can test attenuation at both the threshold of hearing perception and at supra-threshold levels, allowing for effective testing in fluctuating noise conditions.
Career Highlights
Arnold Frisch is associated with Hearing Evaluation & Acoustic Research, Inc., where he applies his expertise in acoustics and hearing protection technology. His innovative approach has led to advancements in the testing and evaluation of hearing protectors, contributing to improved safety standards in various industries.
Collaborations
Frisch has collaborated with notable colleagues, including John M Epley and Austin F Leach, who have contributed to the development and refinement of hearing evaluation technologies.
Conclusion
Arnold Frisch's work in the field of acoustical testing has made a significant impact on hearing protection technology. His innovative patent demonstrates a commitment to enhancing safety in noisy environments. Through his contributions, he continues to advance the understanding and effectiveness of hearing protectors.