Investigating Hearing With the Ponto 4, a Bone Anchored Hearing Aid

"Audiometry: Thresholds from the audiogram obtained when Ponto 4 were fitted. Pure tone air conduction (AC) and bone conduction (BC) audiometry conducted at the visit.~Speech recognition in quiet: Speech intelligibility is measured in a soundproof room using the Matrix sentences presented from a loudspeaker. The Matrix test includes five-word sentences with a fixed syntactical structure and limited contextual cues. A list of 20 sentences is compiled from these words, ensuring that no sentence is repeated twice. This test will be obtained both unaided and aided (with and without the Ponto 4(s)).~Sound field Audiometry: Detection of sound field thresholds presented from a loudspeaker. Thresholds will be obtained both unaided and aided and the test order will be balanced between subjects. During these measurements, the Ponto 4 will be programmed in omni-directional mode, with noise reduction and feedback management system turned off."