created sense approved 扩音机/擴音機 · kuòyīnjī · amplifier
扩音机 / 擴音機
kuòyīnjī
amplifier
an electronic device used to increase the power or volume of an electrical signal
这个扩音机能显著提高音响系统的音质。
noun
created sense approved 扩音机/擴音機 · kuòyīnjī · hearing aid
扩音机 / 擴音機
kuòyīnjī
hearing aid
a small electronic device worn in or behind the ear to help a person hear better
这款扩音机非常小巧，适合老人佩戴。
noun
created sense approved 扩音机/擴音機 · kuòyīnjī · loudspeaker
扩音机 / 擴音機
kuòyīnjī
loudspeaker
a device that converts electrical signals into sound, often used for public addresses
他拿着扩音机向人群喊话。
noun