The first electrical hearing aids were carbon and were made possible by the invention of the carbon microphone and were made between 1900 and 1939. Carbon, which can be made to amplify electrical current, was used to provide some amplification prior to the invention of vacuum tubes. Later models often came with mechanical (carbon) amplifiers to try to boost the amount of amplification. The carbon microphone was originally invented for use in the telephone and had the properties of being able to modulate current. It is this property that made it useful in the early electrical hearing aids. An example of a carbon hearing aid. This has an imitation tortoise shell casing. Round dark red and black imitation tortoise shell carbon hearing aid with clip for attaching to clothing, and a slide for adjusting the sound (?) a cord split between a plug and a speaker (?)."SONOTONE/REG U.S.P.A./292392/MADE IN U.S.A./ELMSFORD, N.Y." on bottom of unit. "SONOTONE" on plug. "PAT RE 21030" on speaker? deaf children australia, hearing aid, sonotone

Gas and Fuel Fashion,Food,Fitness. Male Standing in front of microphone, Curly hair, wearing grey cardigan and red beige horizontal strips shirt. Date and Location Unknown.event, social, gas & fuel fashion, food, fitness

EIG School - Ralph Birrell Collection. - Construction of Latrobe Uni. C1966. Bendigo Institute of Technology, Engineering School, Applied Science. Lady and gentleman at microphone Ralph Birrell of to the left.Kodakeducation, tertiary, latrobe university bendigo, eig school - ralph birrell collection. - construction of latrobe uni. c1966. bendigo institute of technology, engineering school, applied science. lady gentleman microphone ralph birrell left

A photograph of Linda George singing for the troops in Vietnam, Xmas 1970, you can see the back of Brian May conducting the ABC show band.Black and white photograph of young woman on stage with a hand held microphone. She is wearing an abstract -patterned mini-dress with halter neck. Man in the background standing with back to her.abc show band, xmas 1970, vietnam, linda george, brian may, performers, entertainers

Rev R G Nichols (Brother Bill) was the Anglican vicar of St. Marks, Fitzroy. He broadcast a regular talk on 3AR and 3LO, and his talks were published in 1930.B & W waist length studio photograph of Rev. R.G. Nichols sitting before a 3LO Melbourne microphone. The photograph is signed "R.G.Nichols" across the lower left hand corner.With my sincere regards, Brother Bill.rev r.g. nichols, brother bill, st. marks fitzroy, radio, 3lo, 3ar

Photograph, Bert Graham Collection, Frank Henry at microphone, one person to his left, 2 people at the back and 8 others to the right of him. On back the name of Frank Henry.bendigo, clubs, bendigo east swimming club

Black & white photograph, Bert Graham Collection, Alan Masters at the microphone, with Alwyn Nelson on the Piano Accordion in front of a table of trophies, and three people looking on.Names mentioned on back.bendigo, clubs, bendigo east swimming club

Karaoke Machine in black wooden box, with 5 inbuilt speakers, 2 tape decks, 1 play backing, and 1 record. Two plastic handles on the sides. The microphone is missing.Studio HK-DX4 4-Bassmusic synthesisers

Black and white photograph of David Peace master of ceremonies standing at microphone on bank of truck at primary school Centenary celebrations with the Time Capsule that was buried in the front yard Johnsonville Victoriaschools, celebrations, officials

Perce McGuire WHITE speaking at the Port Melbourne Bowling Club. L- R Unknown couple, Marlene MITCHELL, Cr Barry MITCHELL, Ronald 'Bunna' WALSH with Perce at the microphone.perce mcguire white, port melbourne bowling club, ronald 'bunna' walsh, marlene mitchell, cr barry mitchell

Postcard: Prince of Wales, sitting at desk, writing. On bottom, HRH the Prince of Wales, at the home. On back in pencil, from MHS. Beagles Post Cards.a Kellogg "Microphone" telephone is shown in the photoroyalty, british, prince of wales, prince of wales, royalty / kellogg "microphone" telephone

EIG School - Ralph Birrell Collection. - Construction of Latrobe Uni. C1966. Bendigo Institute of Technology, Engineering School, Applied Science. Gentlmen and lady at the microphone, during the unveiling of the Foundation Plaque.Kodakeducation, tertiary, latrobe university bendigo, eig school - ralph birrell collection. - construction of latrobe uni. c1966. bendigo institute of technology, engineering school, applied science. gentlmen lady microphone during unveiling foundation plaque

Top half life-sized mannequin of a soldier in jungle greens shirt, hat, scarf watch, two pens in pocket. He is holding a movie camera with microphone chord through webbingmannequin, john neervoort, uniform, clothing, movie camera

Colour photograph of the opening of the Hepburn Springs Swiss/Italian Festa at the Sound Shell in the Hepburn Mineral Springs Reserve. Ian Tinetti is at the microphone and Mayor Michael Chesire stands beside him.hepburn springs sound shell, hepburn springs mineral springs reserve, brutalist architecture, ian tinettie, michael chesire, hepburn springs swiss italian festa, brutalism

Colour photograph. Emu Creek Bush Band on stage. Woman in black hat speaking into microphone. Small poster reads Bendigo Y's Men. Back of photo reads: Emu Creekentertainment, music, bendigo y's men

Black and white photograph of Jack Froud standing at microphone on back of truck at Centenary Celebrations at primary school . Sign on back of truck Welcome Back to Johnsonville 1886 - 1986 Johnsonville Victoriaschools, celebrations, officials

Black and white photograph of Peter McGauren member of parliament standing at microphone on back of truck at Centenary celebrations at primary school sign on truck Welcome to Johnsonville 1886 -1986. Johnsonville Victoriaschools, celebrations, officials

Mrs Val Walton School Council PresidentBlack and white photograph of Val Walton with microphone standing in front of newly installed portable classroom at primary school, prior to cutting the ribbons across the doorway at opening ceremony Johnsonville Victoria.schools, celebrations, buildings

Depicted is an unidentified male performer dressed in women's clothing. He is positioned on a stage and in front of a microphone. The photograph appears to have been taken by a reporter from the Ovens and Murray Advertiser; a weekly newspaper published in Beechworth.The photograph provides insight into entertainment, performance and recreation in Beechworth during the 1950s. The item's interpretive capacity is enhanced by its strong relationship to other photographs in the catalogue. Collectively, these records enrich the community's understanding of how the arts have developed in Beechworth since the mid-twentieth century.Black and white rectangular photograph printed on matte photographic paper.Reverse: THE OVENS AND MURRAY ADVERTISER /entertainment album, entertainment, 1950s, performance, theatre, theatrical group, arts, the ovens and murray advertiser, newspaper, beechworth, actor

Port of Portland Authority archivesFront: (no inscriptions) Back: '86/ Capt Don O'Donnell/ H.M. (blue pen, centre)port of portland authority archives

Vietnam era issue flying helmet type HGU-2A/P. The helmet is manufactured from fibreglass in a jungle green finish and has a thick high density plastic foam lining for head protection. Complete with an adjustable chin strap and a dual visor kit of clear and tinted visors to protect the eyes. This helmet is fitted with two loudspeaker/earphones and a microphone positioned in front of the mouth of the wearer. The microphone has a flying lead with an audio connector for connection to the aircraft communications equipment.

Roger Mitchell reports on a night at the 3UZ studio and the story behind the psychologist behind the microphone. Referred to as "the launching pad for a new Uniting Church presence on the radio." The Rev. Dr Paul Moore is an ordained minister of the Uniting Church and a psychologist.Paul Moore sitting opposite Sjaak Kusters being interviewed on radio 3UZ 927.Identification of the persons and the C&N edition 20/2/85 pp. 20-23.moore, paul, 3uz, sunday evening program

EIG School - Ralph Birrell Collection. - Construction of Latrobe Uni. C1966. Bendigo Institute of Technology, Engineering School, Applied Science. Laying the Foundation Stone, Ralph Birell with a lady at the microphone, and a gentleman in the background.Agfacoloreducation, tertiary, latrobe university bendigo, eig school - ralph birrell collection. - construction of latrobe uni. c1966. bendigo institute of technology, engineering school, applied science. laying foundation stone, ralph birell lady microphone gentleman

used as a Siren Black metal siren control made by the public safety company St Louis model no 63114 made in the USA Microphone attached to cable mad e in Korea pN 7311 Silver clip on rear

Black and white photograph of Miniser of education Mr Ian Cathie standing at microphone on the back of a truck at primary school Centenary Celebrations Sign on back of truck reads Welcome Back to Johnsonville. Johnsonville Victoriaschools, celebrations, officials

The first all transistor hearing aids appeared in 1953. They were created to replace vacuum tubes; they were small, required less battery power and had less distortion and heat than their predecessor. The vacuum tubes were typically hot and fragile, so the transistor was the ideal replacement. The size of these transistors led to developments in miniature, carbon microphones. These microphones could be mounted on various items. There were body hearing aids where the earpiece was connected to the hearing aid and battery pack worn on the body. Ear level hearing aids consisted of eyeglass, behind the ear (BTE), in the ear (ITE), and in the canal (ITC, CIC) hearing aids. A Widex 25 hearing aid from the 1950's made in Denmark. Brown and gold metallic casing with a volume control dial and an on/off switch. The curly wire runs to a circular outer disc. Although not present the disc would normally connect to an ear mould which is individually fitted to the wearer. The item comes in a soft leather case."DENMARK" inscribed on gold front. "WIDEX 25" inscribed on back. "WIDEX" on inside cover of case. "W" on outside cover of case device, hearing aid, loss, hard of hearing, deaf children australia, victorian school for deaf children, vsdc, denmark, widex

The first all transistor hearing aids appeared in 1953. They were created to replace vacuum tubes; they were small, required less battery power and had less distortion and heat than their predecessor. The vacuum tubes were typically hot and fragile, so the transistor was the ideal replacement. The size of these transistors led to developments in miniature, carbon microphones. These microphones could be mounted on various items. There were body hearing aids where the earpiece was connected to the hearing aid and battery pack worn on the body. Ear level hearing aids consisted of eyeglass, behind the ear (BTE), in the ear (ITE), and in the canal (ITC, CIC) hearing aids. Hearing aid with Pink and silver metal pack with attached wire to ear piece. Uses (A) battery. Ear piece moulded for wearer with dials for adjustments. In original box. Transitone and Universal Hearing Aids were manufactured by British Hearing Aids (Aust) P/L. Model 61T. NoV848 "TRANSITONE & UNIVERSAL/HEARING AIDS/BRITISH HEARING AIDS (AUST) P/L" printed on fabric inside lid of box. Inside battery compartment, label "MODEL 61T" ('T' handwritten) "V848" inscribed on hinge.