sound amplifier is a type of…
- en hearing aid (n) ➜
- en hearing aid (n) ➜
Links to other resources
- umbel.org /umbel/sc/HearingAid_NonPrescription
- umbel.org /umbel/sc/HearingAid_Prescription
- sw.opencyc.org /2012/05/10/concept/en/HearingAid_NonPrescription
- sw.opencyc.org /2012/05/10/concept/en/HearingAid_Prescription