|
Rice et al.
|
|
Notes on the development of a new type of hornless loud speaker |
|
CN108353223A
(zh)
|
|
混合扬声器
|
|
US4184398A
(en)
|
|
Self generating electrical pickup for musical instruments
|
|
US2087106A
(en)
|
|
Electrical musical instrument
|
|
US2004735A
(en)
|
|
Loud speaker
|
|
BE365882A
(https=)
|
|
|
|
US4016376A
(en)
|
|
Concave diaphragm for electro-acoustic transducer
|
|
US1953542A
(en)
|
|
Sound reproducing device
|
|
US252256A
(en)
|
|
rogers |
|
US707441A
(en)
|
|
Telephone-receiver.
|
|
US1718353A
(en)
|
|
Loud-speaker
|
|
CN214315570U
(zh)
|
|
一种双功能电磁式耳机
|
|
US222118A
(en)
|
|
Improvement in magnet-telephones |
|
CN103151028A
(zh)
|
|
一种唱出管弦乐声的方法及其实现设备
|
|
US1573797A
(en)
|
|
Electrovibrator
|
|
SU4792A1
(ru)
|
|
Громкоговор щий телефон
|
|
US1792554A
(en)
|
|
Electromagnetic instrument
|
|
KR20250124402A
(ko)
|
|
소리나는 줄넘기
|
|
SU404121A1
(ru)
|
|
Устройство для получения тремоло и вибрато в электромузыкальных инструментах
|
|
SU13856A1
(ru)
|
|
Телефонно-микрофонный усилитель
|
|
JP2001211496A
(ja)
|
|
平面スピーカー
|
|
EXCITED
|
|
Trevor Pinch and Frank Trocco |
|
US1110228A
(en)
|
|
Telephone-receiver.
|
|
US1415807A
(en)
|
|
Sound-reproducing device |
|
US1922181A
(en)
|
|
Loud speaker
|