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Adolph R. Morgan papers, 1951-1971

 Series
Accession: 2464-09Identifier: 2464-09-2.-V.

Dates

  • Creation: 1951-1971

Biographical Note

The papers of A.R. Morgan focus on three areas of electronics. They are the electronics of permanently polarized electrostatic microphones, SONAR pulse projection, and noise cancellation of submarine pumps.

The permanently polarized electrostatic microphone (electret) was the most current in 1962 after a long evolution of microphones which began with the carbon microphone invented by D.E. Hughes in England and by Thomas Edison and Emile Berliner in the United States. Edison was awarded a patent in 1877 amidst a bitter controversy regarding who was the first to transmit speech via the carbon microphone. Controversy was further extended when witnesses declared that Hughes had transmitted speech through a carbon microphone years earlier in England. Hughes is credited with the invention. Following 85 years of improvements to the microphone, Morgan experimented with a microphone which could be used without a source of wired electricity, operating with a permanently charged capacitance device offering more flexibility without being wired to just one location during use.

Morgan also worked on the development of a projector to provide improved SONAR (SOund NAvigation and Ranging). The pulse SONAR projector transmitted a pulse of electrical signals through water which bounce off of a target and returns in the form of sound signals, measuring the length and width of the pulse, translated into time and size of the target. Morgan's work with a superpower pulse projector lead to his patent for an underwater object locator in 1960.

Morgan's experiments with signals through water lead him to experiment with the cancellation of noise created by a pump in a submerged submarine. His work with noise control contributed to the electronics of stealth movement and underwater communications of submarines, especially during military engagements.

Scope and Content

The papers of Adolph R. Morgan include evidence of his work with underwater communications, microphones, and noise cancellation of underwater sounds.

One of Morgan's lab notebooks (1954-1960) can be found in Record group 26.

Arrangement

The papers of A.R. Morgan are arranged chronologically.

Extent

From the Collection: 990 Linear Feet

Language of Materials

From the Collection: English

Additional Description

Access Restrictions

This collection contains material from the Manuscripts and Archives Department (M&A) and the Audiovisual Collections and Digital Initiatives Department (AVD). Box prefixes indicate which department holds an individual file or item.

Boxes M&A 127-846, M&A 1061-1064, and M&A 1283-1313 are stored offsite. Please contact the Manuscripts and Archives Department at least 48 hours in advance of research visit.

Arrangement

The papers of A.R. Morgan are arranged chronologically.

Provenance

Donated to the David Sarnoff Library by the Sarnoff Corporation in 2007.

Processing Notes

Processed by David Burdash, 2014.

Related Names

Subject

Creator

Repository Details

Repository Details

Part of the Manuscripts and Archives Repository

Contact:
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Wilmington Delaware 19807 USA
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