| 释义 |
magnetophone|mægˈniːtəʊfəʊn|
[f. magneto- + Gr. ϕωνή sound.]
1. A magnetic instrument used for the production of musical tones.
1883Carhart in Science II. 394 The intensity of the sounds obtained by the magnetophone is sometimes so great as to be painful to the ear when the telephone is held closely against it.
2. An early form of moving-coil microphone.
1922Encycl. Brit. XXXII. 528/1 The behaviour of microphones in this respect was often unsatisfactory, and telephone earpieces, or magnetophones, were frequently substituted for them. This results in diminished sensitivity, but the binaural effects are much improved. 1929J. A. Ratcliffe Phys. Princ. Wireless v. 73 A microphone of quite a different type is much used at the present day for broadcasting. It is known as the magnetophone, and consists of a small coil of very light aluminium wire attached to the back of a freely moving diaphragm. The coil is placed between the poles of an electro-magnet. 1931B.B.C. Year-Bk. 445/2 The magnetophone is relatively insensitive, and its output requires considerable amplification. 1962Listener 8 Nov. 765/3 Two of the earliest [sc. BBC microphones] are to be seen..: Round–Sykes ‘magnetophone’, [etc.].
3. Also -phon. [a. G. magnetophon.] A tape recorder. (Used chiefly as a rendering of the German or with reference to German machines.)
1946Wireless World Feb. 53/1 The equipment, known as the magnetophone, uses a thin plastic tape, about 0·25 in. wide, coated with a metallic powder film. 1949Electronic Engin. XXI. 124/3 Sound recorders of the magnetophone type make use of two oscillatory currents in the recording head. 1953F. Spandöck in E. G. Richardson Technical Aspects Sound I. xv. 410 After the Second World War magnetophones were built in many countries in many different forms. 1954Sci. Abstr. B. LVII. 245/1 The various tests carried out on magnetophones, microphones and amplifiers are enumerated. 1974Encycl. Brit. Macropædia XVII. 55/2 The Magnetophon Company of Germany succeeded in producing a magnetic film-coated tape that constituted a low-cost recording medium. During World War II the magnetophon, using the coated tape, served the Nazi propaganda organizations well. |