Principles And Workings Of The Bose Radio

#engineering #electronics #affinity #Bose #Radio #Acoustics #life #member

Loudspeakers are fundamental to maintaining the fidelity of sound in radios, TV, and theater, and aficionados have debated the reproduction quality of different types of loudspeakers and their associated electronics for decades.  The goal of the early loudspeakers was to modify and suppress acoustic radiation from the rear of the speaker-driver. Further work on such speakers concentrated on materials that could suppress selective radiation from the rear diaphragm.  However, in 1984, a class of loudspeakers was introduced by Bose, designated "acoustic wave speakers", which are more generically called transmission line (TL) speakers.  Rather than suppressing the acoustic energy from the rear of the driver, a means was engineered to use standing waves to constructively sum radiation from both the front and the rear of the driver.  This allowed exceptional bass response in a small volume. The TL speaker's science and operation in the Bose radio context will be described. Analogies between antennas and the acoustic wave system will be used to help frame the analysis in electrical engineering terminology. 

  Date and Time




  • Date: 27 Sep 2023
  • Time: 09:15 AM to 10:30 AM
  • All times are (UTC-04:00) Eastern Time (US & Canada)
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  • RIT Inn & Conference Center
  • 5257 West Henrietta Road
  • Henrietta , New York
  • United States 14467
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  • Co-sponsored by Antique Wireless Association
  • Starts 04 September 2023 10:56 PM
  • Ends 27 September 2023 09:15 AM
  • All times are (UTC-04:00) Eastern Time (US & Canada)
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Ram Dhurjaty Ram Dhurjaty of Dhurjaty Electronics Consulting LLC, Rochester, NY, 14618


Bose Radio Technology


Seeram (Ram) Dhurjaty was admitted to the Indian Institute of Technology (IIT) in Bombay, India, at the age of 15. He continued at IIT until 1976 when he received a Doctorate in Biomedical Engineering. In 1976, he joined Yale University for a graduate degree in mathematical control theory. He was subsequently a postdoctoral fellow at Yale New Haven Hospital, where he researched nuclear medicine instrumentation and early Computed Tomography (CT) Scanners.

Ram has occupied several senior technical positions in industry. Over the years, he worked at Analogic Corporation in Massachusetts, designing fetal monitoring systems, ultrasound imaging systems, and CT scanner front ends. He worked at Bose, on leave from Analogic, to understand acoustics and loudspeakers. He then worked at the Eastman Kodak Company for 20 years, working on digital radiography. He was the primary inventor of the retrofittable X-ray detector, which is now ubiquitous in diagnostic radiology. At Kodak, he had the title of Technology Guru. 

After leaving Kodak in 2005, he started a consulting company designing magnetic resonance imaging (MRI) systems and X-ray generators.  He holds 17 patents, including a patent (now expired) for a hand-cranked defibrillator.  He holds a commercial pilot’s license. He is a Senior Member of the IEEE, where he is the Distinguished Speaker for the Consumer Technology Society and a past chair of the IEEE Rochester Section.  He is a member of AHA, AWA, and SPIE and an emeritus member of the AAPM.


Address:115 Sylvania Rd., , Rochester, New York, United States, 14618


For all vTools registrants: Please check in at the registration desk when you arrive and indicate that you registered for Wednesday through the IEEE registration site. They will give you a name tag.

9:15 am-10:30 am -- Principles And Workings Of The Bose Radio, by Ram Dhurjaty

Other Wednesday Talks and Demonstrations Available to Registrant Attendees:

10:45 am - 12:00 pm -- Audio Forum, by Dave Minchellla & Bill Tomkiewicz

1:00 pm - 2:15 pm -- Laser Communication Relay Demonstration (LCRD), by Jim Porter, NASA Ambassador

2:30 pm - 3:45 pm -- Radio Club of America Helps Invent Radio (focusing on the 1920s) by Dave Bart & Felicia Dreuzer 

Other activities and other days are only available to attendees who register for the entire AWA Conference. (see  AWA Conference Main Page )

Please Note that if you register for the entire AWA conference, this talk is included, so there is no need to register for it separately on this site.

Special instructions to those who register for the entire conference, attend the talk, and want a PDH credit: Please send an email to Mark Schrader at saying that you registered for the entire conference and would like a PDH certificate for the Bose radio talk. 





An IEEE Rochester Section In-Person Event