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Citations

Full citation sheet with sources for written information and images, organized by each page. 

Homepage

Images

“Radioear Display”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 47, Folder 3.

Acoustic Hearing Aids

Information

  1. Bauman, Neil. “The Hearing Aids of Yesteryear.” Canadian Audiologist, Canadian Audiologist | The Official Publication of the Canadian Academy of Audiology, 22 Aug. 2020, canadianaudiologist.ca/the-hearing-aids-of-yesteryear/.

  2. Pulse, IEEE. “Hearing Aid History: From Ear Trumpets to Digital Technology - IEEE Pulse.” IEEE Pulse, 4 Mar. 2022, www.embs.org/pulse/articles/hearing-aid-history-from-ear-trumpets-to-digital-technology

  3. Bauman, Neil, and Hugh Hetherington. The Hearing Aid Museum, hearingaidmuseum.com/index.htm. Accessed 13 Sept. 2025.

  4. Bauman, Neil, and Hugh Hetherington. “Ear Trumpets (Ear Horns)—General Information.” The Hearing Aid Museum, https://www.hearingaidmuseum.com/gallery/General_Info/GenInfoNonElect/info/generalinfo-eartrumpets.htm . 2006-2019.

  5. Bauman, Neil, and Hugh Hetherington. “"Bugle" or "Bonnafont" Ear Trumpet (Ear Horn)” The Hearing Aid Museum, https://www.hearingaidmuseum.com/gallery/Non-Electric/EarTrumpets/Long%20Trumpets/info/bugle.htm. 2006-2019.

  6. Bauman, Neil, and Hugh Hetherington. “Walking Stick Ear Trumpet (Ear Horn)” The Hearing Aid Museum, https://www.hearingaidmuseum.com/gallery/Non-Electric/EarTrumpets/Long%20Trumpets/info/walkingstick.htm. 2006-2019.

  7. Bauman, Neil, and Hugh Hetherington. “Conversation Tubes—General Information” The Hearing Aid Museum, https://www.hearingaidmuseum.com/gallery/General_Info/GenInfoNonElect/info/generalinfo-conversationtubes.htm. 2006-2019.

  8. Bauman, Neil, and Hugh Hetherington. “Auricles—General Information” The Hearing Aid Museum, https://www.hearingaidmuseum.com/gallery/General_Info/GenInfoNonElect/info/generalinfo-auricles.htm. 2006-2019.

Early Radioear

Information

  1. “The Radioear Voice No. 35”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 38, Folder 31.

  2. “Radioear Group Hearing Aid”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 10.

  3. “c. 1924-1982 Installations c. 1928-1930, 1928-1930”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 55.

Images

  1. “Hearing Aid Company to Open Laboratory in Peters Township”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 10.

  2. “Production Model Original Radioear”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 56.

  3. “1930-1934, 1930-1934". Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 57.

  4. “Radioear Group Hearing Aid”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 10.

  5. “c. 1924-1982 Installations c. 1928-1930, 1928-1930”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 55.

Model B6

Information

  1. Skafte, Marjorie. “A “Living Legend”: Samuel F. Lybarger”. The Hearing Review. August 1994, https://hearingreview.com/wp-content/uploads/2022/04/SamLybarger_0794HR.pdf 

  2. Bauman, Neil, and Hugh Hetherington. “Carbon Hearing Aids—General Information” The Hearing Aid Museum, https://hearingaidmuseum.com/gallery/General_Info/GenInfoCarbon/info/generalinfo-carbon.htm 2006-2019

  3. Bauman, Neil. “The Hearing Aids of Yesteryear.” Canadian Audiologist, Canadian Audiologist | The Official Publication of the Canadian Academy of Audiology, 22 Aug. 2020, canadianaudiologist.ca/the-hearing-aids-of-yesteryear/.

  4. “The History of Carbon Microphones and Artifacts from the Shure Archives.” Shure, 29 Apr. 2020, https://www.shure.com/en-US/insights/the-history-of-carbon-microphones-and-artifacts-from-the-shure-archives

Images

  1. By Daderot - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=35103283

  2. “First One-Piece Radioear”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 57.

  3. “Model B6 Radioear with Flat Receiver, S.F. Lybarger”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 57.

  4. “Experimental Model of B6 Radioear”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 46, Folder 57.

Model B10

Information

  1. Bauman, Neil, and Hugh Hetherington. “Vacuum Tube Hearing Aids—General Information” The Hearing Aid Museum, https://hearingaidmuseum.com/gallery/General_Info/GenInfoVacuumTube/info/generalinfo-vacuumtube.htm 2006-2019.

  2. Bauman, Neil. “The Hearing Aids of Yesteryear.” Canadian Audiologist, Canadian Audiologist | The Official Publication of the Canadian Academy of Audiology, 22 Aug. 2020, canadianaudiologist.ca/the-hearing-aids-of-yesteryear/. 

  3. “Radioear Price Lists, Parts and Accessory Catalogs, and Revisions, December 1935 - June 1, 1949.” Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 41, Folder 4d.

Images

  1. commons.wikimedia.org/wiki/File:CK512AX_subminiature_pentode.jpg. Accessed 9 Dec. 2025.Ser Amantio, Nicolao. Pair of Vintage Sparton Type C-401 Triode Globe Vacuum Tubes, Same Tube Also Branded as Cardon, Made in USA, circa 1920s, 14 Aug. 2017.

  2. “B-10 – 1150, 1932". Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 14, Item 1.

Radioear 45

Information

  1. “Model 45 Instruction Manual”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 39, Folder 8.

  2. “Fitted with the Selex-A-Phone”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 10.

Images

  1. “Display Announcing Model 45 Radioear". Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 47, Folder 3.

  2. “Radioear 45”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 22.

  3. rf, Mister. The CK512AX Is a Filament Type Subminiature Pentode Designed Primarily for Use in Resistance Coupled Audio Frequency and Direct Coupled Amplifiers., 8 Feb. 2023 

  4. “First Hermetically sealed amplifier -- a Radioear first". Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 11.

  5. “Fitted with the Selex-A-Phone”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 10.

  6. Julo. “Eveready #742 1½ Volts, Portable “A” Battery for 1.4 Volt Receivers,” Https://Commons.wikimedia.org/Wiki/File:A_battery_(Eveready_-742).Jpg, 30 Jan. 2008. Accessed 9 Dec. 2025.

  7. Whitepines. Eveready #762-S 45 Volts, Radio “B” Battery (Portable Size), 4 Mar. 2014, commons.wikimedia.org/wiki/File:B_battery_%28Eveready_-762-S%29.jpg. Accessed 9 Dec. 2025.

Model 840 "Lady America"

Information

  1. Bauman, Neil. “The Hearing Aids of Yesteryear.” Canadian Audiologist, Canadian Audiologist | The Official Publication of the Canadian Academy of Audiology, 22 Aug. 2020, canadianaudiologist.ca/the-hearing-aids-of-yesteryear/. 

  2. “Price Lists, April 1, 1955 - March 1, 1971”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 14.

  3. Bauman, Neil, and Hugh Hetherington. “Radioear Model 840 “Lady America" Hearing Aid” The Hearing Aid Museum, https://hearingaidmuseum.com/gallery/Transistor%20(Body)/Radioear/info/radioear840b.htm. 2006-2019.

  4. ​"Engineering Bulletin". Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 47, Folder 8b.​

Images

  1. “840, Copy 3 – 45J7/2K26, grey with M74 receiver, cord, bag, presentation case, Lady America clip, 1956”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 27, Item 4.

  2. 1956, 1956. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 47, Folder 8b.

  3. “Radioear Price Lists, Parts and Accessory Catalogs, and Revisions, December 15, 1949 - March 1, 1957”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 41, Folder 4c.

  4. “840, Copy 6 – 13H8/1N56, grey with eyeglass fronts, M74 receiver, and cord, 1956”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 27, Item 7.

  5. “Beauty Calls On Deafness”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 47, Folder 8b.
     

BICROS 1010

Information

  1. “Model 1010 Instruction Booklets, 1970”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 39, Folder 29.

  2. “Radioear Price Lists, Parts and Accessory Catalogs, and Revisions, April 2, 1964 - March 1, 1971”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 41, Folder 4a.

  3. “Advertising Materials: Proofs & Marilyn Brett HAIC Feature, August 1, 1945 - September 11, 1973”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 16.

  4. “Price Lists, April 1, 1955 - March 1, 1971”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 14.

Images

  1. “1040, Copy 2 – 79IB3590, Mocha with inactive, 1974”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 30, Item 9.

  2. “Radioear Price Lists, Parts and Accessory Catalogs, and Revisions, April 2, 1964 - March 1, 1971”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 41, Folder 4a.

  3. “Advertising Materials: Proofs & Marilyn Brett HAIC Feature, August 1, 1945 - September 11, 1973”. Radioear Corporation Records, 1900-1990, AIS.2023.21, Archives of Industrial Society, Archives & Special Collections, University of Pittsburgh Library System, Box 40, Folder 16.

3D Scanning

Kaple, Dan. Scanning consultation at Thomas Blvd. 28 November 2025.

About - FAQ

Rampelt, Jason. Personal interview. 24 November 2025.

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