This Ardente hearing aid was made by R H Dent in Oxford Street, London. A product of the then new microphone and battery technology, this device amplified sounds in a much more convenient way than the earlier Victorian ear trumpet.

This Ardente hearing aid was made by R H Dent in Oxford Street, London. A product of the then new microphone and battery technology, this device amplified sounds in a much more convenient way than the earlier Victorian ear trumpet.

This Ardente hearing aid was made by R H Dent in Oxford Street, London. A product of the then new microphone and battery technology, this device amplified sounds in a much more convenient way than the earlier Victorian ear trumpet.

This Ardente hearing aid was made by R H Dent in Oxford Street, London. A product of the then new microphone and battery technology, this device amplified sounds in a much more convenient way than the earlier Victorian ear trumpet.

This Ardente hearing aid was made by R H Dent in Oxford Street, London. A product of the then new microphone and battery technology, this device amplified sounds in a much more convenient way than the earlier Victorian ear trumpet.