Ear canal earbud sound system

• US 20140301560A1
• Filed: 04/04/2013
• Published: 10/09/2014
• Est. Priority Date: 10/12/2010
• Status: Active Grant

• Current Assignee: Vladimir Walter Kukurudza
• Original Assignee: Vladimir Walter Kukurudza
• Inventors: Kukurudza, Vladimir Walter
• Granted Patent: US 9,232,295 B2
• Time in Patent Office: Days
• US Class Current: 381/74
• CPC Class Codes: H01F 19/02 Audio-frequency transformers or mutual inductances, i.e. not suitable for handling frequencies considerably beyond the audio range
• CPC Class Codes: H04R 1/023 Screens for loudspeakers
• CPC Class Codes: H04R 1/1016 Earpieces of the intra-aural type
• CPC Class Codes: H04R 1/1083 Reduction of ambient noise active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06

Abstract

An earbud sound system for a small speaker system having at least one earbud with a speaker and having, an earbud housing body defining a hollow interior a a circuit board within the housing body and having a signal input connection and a ground connection, and a speaker output connection and a speaker return connection; a bifilar coil unit having first and second coils wound in a bifilar manner, mounted on the circuit board within the housing body, and there being two first coil connections, and two second coil connections on the circuit board, for supporting the bifilar coil unit in a secure manner on the circuit board.

Claims

1. An earbud sound system for a small speaker system having at least one earbud (20, 22) with a speaker (58) and characterised by;

an earbud housing body (30, 36) defining a hollow interior;

a circuit board (50) within said housing body and having a signal cable (18) with an input and a ground portion;

a bifilar coil unit (52) comprising a supply coil (S) and a return coil (R) wound in a bifilar manner, mounted on said circuit board;

two supply coil connections (54, 56), and two return coil connections (60, 62) on said circuit board, for supporting the bifilar coils in a secure manner on said circuit board;

by securing said bifilar coil unit to respective said coil connections on said circuit board;

conductors in said circuit board connecting said supply coil and return coils between to respective supply and ground portions of said cable (18).

2. An earbud sound system as claimed in claim 1 including:

a forward circuit board side and a rea circuit board side, with said signal input and ground connection arranged side by side on said forward side, and with said signal supply and ground portions of said cable on said rear side.

3. An earbud sound system as claimed in claim 1 including:

a signal source (14), for source of audio signals, a head set (20) having left and right speakers (20,22), and a wire harness (12, 18) connecting said signal source and said head set, and a compact noise suppression circuit (50) incorporated in each of said left and right speakers.

4. An earbud sound system as claimed in claim 1 including:

left and right hand earbud housing bodies (30,36), sized to fit within the ear canals of a user, each of the earbud housing bodies defining a hollow interior, and wherein a said noise suppression circuit is contained within each respective earbud housing bodies.

5. An earbud sound system as claimed in claim 1 wherein said earbud housing body (30,36) is formed as first and second body portions separate from one another to give access to the interior of said housing and wherein a said noise suppression circuit is fitted within one said body portion, and wherein the other said body portion is secured to said first portion, thereby enclosing the noise suppression circuit.

6. An earbud sound system as claimed in claim 5 wherein each said earbud housing body is of cylindrical shape in section and wherein said circuit board (50) is of circular disc shape, and fits within its respective housing, transversely of said housing interior, with the centre of the disk aligned with the central axis of the housing.

7. An earbud sound system as claimed in claim 6 wherein each said earbud housing body is formed as two components (30,36), each of cylindrical shape in section, and including a connecting lip (32) on one said component, and a ridge(38) on the other said component, said lip and said ridge being complementary and interfitting to join said components together.

8. An earbud sound system as claimed in claim 1 including a tube (40) extending from one end of one component, and an ear cushion (24) fitted onto said tube, and said tube defining a hollow interior for transmission of sound from a respective said speaker to the user.

9. An earbud sound system as claimed in claim 5 wherein said circuit board defines a forward side and a rear side, and wherein said forward side is directed towards said speaker (58), and wherein said bifilar coil (52) is mounted on said forward side, and wherein said rear side is directed towards said signal cable (18).