The Coles 4038 is a ribbon microphone produced by Coles Electroacoustics. She was educated as an engineer in electroacoustics and ultrasound at Odessa Polytechnic Institute. The first was Electroacoustics, published in 1954. These methods include microelectrophoresis, electrophoretic light scattering and electroacoustics. Toft later partnered with Ted Fletcher and Fletcher ElectroAcoustics to form Trident-MTA. Quad Electroacoustics is a British manufacturer of hi-fi equipment, based in Huntingdon, England.