Electromagnetic microphone for string instruments

• US 20030051596A1
• Filed: 10/18/2002
• Published: 03/20/2003
• Est. Priority Date: 12/14/1999
• Status: Abandoned Application

• Current Assignee: Peter Gustafsson
• Original Assignee: Peter Gustafsson
• Inventors: Gustafsson, Peter
• Application Number:
  US10/149,594
• Publication Number:
  US 20030051596A1
• Time in Patent Office: Days
• US Class Current: 84/723
• CPC Class Codes: G10H 3/181 Details of pick-up assemblies

Abstract

An electromagnetic microphone for string instruments provided to register vibrations in a magnetised string/strings (1), in which at least one coil (2) is provided to register the sideway oscillation of the strings (1).

Claims

1. An electromagnetic microphone for registering vibrations in strings provided on a string instrument mainly in one plane, comprising at least one permanent magnet (3) for magnetising the strings (1), and at least one coil (2) in which a current is induced by movements of the strings (1), characterised in that the coil or coils (2) are arranged having their centre axes oriented parallel to the string plane and orthogonal to the extension of the strings (1), such that sideway oscillations of the strings (1) are registered by current induction in the coil or coils (2).

2. A microphone according to claim 1, characterised in that the coil or coils (2) are air-cored, i.e. without a core.

3. A microphone according to claim 1 or 2, characterised in that one coil (2) is arranged for each string substantially straight underneath the string (1), and that one permanent magnet (3) is arranged for each pair of strings between the two strings (1) in substantially the same plane as the coils (2).

4. A microphone according to claim 1 or 2, characterised in that one coil (2) is arranged substantially straight underneath each string (1), and that permanent magnets (3) are arranged, one at each side of each string (1), in substantially the same plane as the coils (2).

5. A microphone according to claim 1 or 2, characterised in that one coil (2) is arranged for each pair of strings substantially between and underneath the strings (1) of the pair, and that permanent magnets (3) are arranged between the coils (2), and at the outer sides thereof, in substantially the same plane as the coils (2), such that the coils (2) have a permanent magnet (3) at each side thereof.

6. A microphone according to claim 1 or 2, characterized in that one coil (2) is arranged for each pair of strings substantially between and underneath the strings (1) of the pair, and that one permanent magnet (3) is positioned underneath each coil (2).