| 摘要 |
An electromagnetic pickup assembly for a musical instrument, such as a guitar, strung with ferromagnetic strings, comprises an elongated high permeability ferromagnetic (steel or iron) core long enough to span all of the strings. An elongated, annular electrically conductive pickup coil is wound in a coil form, usually plastic, that encompasses the core. An elongated, unitary, annular permanent magnet closely encompasses all sides of the coil; it is transversely magnetized to maintain the core and the coil in a magnetic field of a given polarity. There is no permanent magnet engaging the core. A housing or other mounting is used to mount the core, the coil, and the permanent magnet in spaced relation to the strings so that the pickup generates a magnetic field that encompasses all of the strings, whereby movement of any string or combination of strings generates electrical signals in the coils. The housing may include a steel shell around the permanent magnet.
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