留声机
其声音储存在以声学方法在唱片（圆盘）平面上刻出的弧形刻槽内。
唱机旋转部分由发条驱动，使水平圆盘和放在它上面的唱片作匀速旋转，圆盘转速可以由调速器控制；唱针一端有金属膜片，膜片中心和唱针相连接；随着唱片转动，唱针发生振动，由杠杆作用把振动放大，推动膜片做相应的振动，于是就可以听到加强了的和灌片时相同的声音；为了使唱针上的膜片的振动有效发声，在膜片后要接上一只喇叭。
留声机于1888年由美国发明家伯利那（E.Berliner，1851-1929）首先演示，唱片后来逐渐取代了筒式留声机，因为唱片能比较方便地大量复制，放音时间也比大多数筒形录音介质长。
The phonograph, in its later forms also called a gramophone (from the Greek: γράμμα, gramma, "letter" and φωνή, phōnē, "voice") or record player, is a device introduced in 1877 for the mechanical recording and reproduction of sound. The sound vibration waveforms are recorded as corresponding physical deviations of a groove engraved or impressed into the surface of a rotating cylinder or disc. To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and is therefore vibrated by it, very faintly reproducing the recorded sound. In early non-electronic phonographs, the slight vibrations of the stylus are physically coupled to the air generally, or to the listener*s ears directly, byacoustical means which greatly increase their audibility; in later phonographs, the motions of the stylus are converted into an analogous electrical signal by a transducer called a pickup or cartridge, electronically amplified, then transduced back into sound by a loudspeaker.
The phonograph was invented in 1877 by Thomas Edison.[1][2][3][4] While other inventors had produced devices that could record sounds, Edison*s phonograph was the first to be able to reproduce the recorded sound. His phonograph originally recorded sound onto a tinfoil sheet phonograph cylinder, and could both record and reproduce sounds. Alexander Graham Bell*s Volta Laboratory made several improvements in the 1880s, including the use of wax-coated cardboard cylinders, and a cutting stylus that moved from side to side in a "zig zag" pattern across the record.
其声音储存在以声学方法在唱片（圆盘）平面上刻出的弧形刻槽内。
唱机旋转部分由发条驱动，使水平圆盘和放在它上面的唱片作匀速旋转，圆盘转速可以由调速器控制；唱针一端有金属膜片，膜片中心和唱针相连接；随着唱片转动，唱针发生振动，由杠杆作用把振动放大，推动膜片做相应的振动，于是就可以听到加强了的和灌片时相同的声音；为了使唱针上的膜片的振动有效发声，在膜片后要接上一只喇叭。
留声机于1888年由美国发明家伯利那（E.Berliner，1851-1929）首先演示，唱片后来逐渐取代了筒式留声机，因为唱片能比较方便地大量复制，放音时间也比大多数筒形录音介质长。
The phonograph, in its later forms also called a gramophone (from the Greek: γράμμα, gramma, "letter" and φωνή, phōnē, "voice") or record player, is a device introduced in 1877 for the mechanical recording and reproduction of sound. The sound vibration waveforms are recorded as corresponding physical deviations of a groove engraved or impressed into the surface of a rotating cylinder or disc. To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and is therefore vibrated by it, very faintly reproducing the recorded sound. In early non-electronic phonographs, the slight vibrations of the stylus are physically coupled to the air generally, or to the listener*s ears directly, byacoustical means which greatly increase their audibility; in later phonographs, the motions of the stylus are converted into an analogous electrical signal by a transducer called a pickup or cartridge, electronically amplified, then transduced back into sound by a loudspeaker.
The phonograph was invented in 1877 by Thomas Edison.[1][2][3][4] While other inventors had produced devices that could record sounds, Edison*s phonograph was the first to be able to reproduce the recorded sound. His phonograph originally recorded sound onto a tinfoil sheet phonograph cylinder, and could both record and reproduce sounds. Alexander Graham Bell*s Volta Laboratory made several improvements in the 1880s, including the use of wax-coated cardboard cylinders, and a cutting stylus that moved from side to side in a "zig zag" pattern across the record.
