A device comprising: an ear occluder (208, 210); an output transducer (216, 218) that is acoustically coupled to an ear canal of a wearer of the device; a voice microphone configured to generate a first electrical signal that is proportional to a voice-generated sound pressure at the microphone; a feed-forward system circuitry, electrically coupled to the output transducer and the voice microphone, wherein the circuitry includes: a compensator configured to generate, from the first electrical signal, a second electrical signal, and output the second electrical signal to the output transducer, wherein the compensator is tuned to cause G O E, a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at a mouth reference point when the ear is occluded and electronically-aided to be equal to G T, a target ratio of sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and electronically-aided, characterized in that the compensator is a linear-time-invariant filter with a frequency response that is defined by K C = G T − G O G MM × G DE; G O is a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and unaided; G MM is a ratio of voltage output from the microphone to the voice-generated sound pressure at the mouth reference point; and G DE is a ratio of the sound pressure within the ear canal to the voltage input to a driver of the device. an ear occluder (208, 210); an output transducer (216, 218) that is acoustically coupled to an ear canal of a wearer of the device; a voice microphone configured to generate a first electrical signal that is proportional to a voice-generated sound pressure at the microphone; a feed-forward system circuitry, electrically coupled to the output transducer and the voice microphone, wherein the circuitry includes: a compensator configured to generate, from the first electrical signal, a second electrical signal, and output the second electrical signal to the output transducer, wherein the compensator is tuned to cause G O E, a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at a mouth reference point when the ear is occluded and electronically-aided to be equal to G T, a target ratio of sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and electronically-aided, characterized in that the compensator is a linear-time-invariant filter with a frequency response that is defined by K C = G T − G O G MM × G DE; G O is a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and unaided; G MM is a ratio of voltage output from the microphone to the voice-generated sound pressure at the mouth reference point; and G DE is a ratio of the sound pressure within the ear canal to the voltage input to a driver of the device. a compensator configured to generate, from the first electrical signal, a second electrical signal, and output the second electrical signal to the output transducer, wherein the compensator is tuned to cause G O E, a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at a mouth reference point when the ear is occluded and electronically-aided to be equal to G T, a target ratio of sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and electronically-aided, characterized in that the compensator is a linear-time-invariant filter with a frequency response that is defined by K C = G T − G O G MM × G DE; G O is a ratio of a sound pressure within the ear canal to the voice-generated sound pressure at the mouth reference point when the ear is occluded and unaided; G MM is a ratio of voltage output from the microphone to the voice-generated sound pressure at the mouth reference point; and G DE is a ratio of the sound pressure within the ear canal to the voltage input to a driver of the device.