Howard B McCracken

Title: **Howard B McCracken: Innovator in Underwater Acoustic Technologies**

Introduction

Howard B McCracken is a distinguished inventor based in Poway, California, renowned for his contributions to underwater acoustic technologies. With a total of five patents to his name, McCracken has made significant advancements that enhance the communication and simulation capabilities within marine environments.

Latest Patents

Among his notable patents, two stand out due to their innovative designs:

1. **Shaft Rub Simulator**

This synthesizer is designed for creating complex acoustic signatures. It features a generator that produces an electrical analog of the "shaft rub" noise generated from the interaction between a marine propeller shaft and stern tube or other through-the-hull marine fittings. The circuitry incorporates digital random generators to synthesize this acoustic noise with a nonrecurring characteristic signal, making it a valuable tool for simulations.

2. **Adjustable Frequency Diversity Acoustic Communications System**

This underwater acoustic communication system allows operators to adjust frequency diversity, enabling data rates tailored to specific multipath environments. Messages are transmitted with precursor transmission/reception synchronization data, allowing the receiving end to recognize the beginning of message data, tone length, and frequency diversity. Timing extracted from the data compensates for Doppler shift, enhancing communication reliability.

Career Highlights

McCracken is proudly affiliated with the United States of America, as represented by the Secretary of the Navy. His role involves developing essential technologies that support the Navy's operational capabilities and improve acoustic communication strategies in complex underwater environments.

Collaborations

Throughout his career, McCracken has collaborated with esteemed colleagues such as Gerald R Mackelburg and Robert S Acks. Together, they have contributed to advancements in marine technology, showcasing the importance of teamwork in driving innovation.

Conclusion

Howard B McCracken exemplifies innovation within the realm of underwater acoustics. His patents, particularly in simulating acoustic signatures and improving communication systems, underscore his dedication to advancing technology for marine applications. As his work continues to impact the field, McCracken remains a pivotal figure in the ongoing evolution of underwater technologies.