Electro-acoustic transducer and housing

A sound reproducing system, comprising:

• a sound reproducing apparatus supplied with acoustic signals;
• and
• an electro-acoustic transducer unit including an electro-acoustic transducer accommodated in a cabinet, and a sound guide tube for conducting the sound from the electro-acoustic transducer out of said cabinet;
• said sound guide tube having at least a sound radiating end with a smaller diameter than an external auditory meatus to permit said sound radiating end to be inserted into the external auditory meatus and to define a space between said sound radiating end of said sound guide tube and said external auditory meatus, said space for allowing surrounding noises to enter the external auditory meatus and be heard by a user;
• said electro-acoustic transducer reproducing at least a low-frequency component of a frequency range of the acoustic signals of the sound reproduced by said sound reproducing apparatus.

An electro-acoustic apparatus comprising:

• an electro-acoustic transducer for receiving electrical signals and for generating acoustic signals;
• a cabinet for enclosing a rear side of said electro-acoustic transducer and wherein a sound radiating side of said electro-acoustic transducer is not enclosed by said cabinet;
• a sound guide tube connected to said cabinet and having a sound radiating end inserted into an external acoustic meatus of a user for conducting more of a low frequency component than higher frequency components of said acoustic signals to said external acoustic meatus;
• wherein an inside diameter of said external acoustic meatus is greater than an outside diameter of said sound radiating end thereby defining a space between said external acoustic meatus and said outside diameter of said sound guide tube for allowing surrounding noises to enter said space and be heard by said user whereby said external acoustic meatus is not completely obstructed by said electro-acoustic apparatus.

An electro-acoustic apparatus, comprising:

• an electro-acoustic transducer having a sound radiating side and a rear side opposite said sound radiating side, said electro-acoustic transducer for converting electrical signals into acoustic signals;
• a cabinet for enclosing said rear side of said electro-acoustic transducer but not said sound radiating side;
• a sound guide tube having one end connected to said cabinet and another end for insertion within an external acoustic meatus of a user;
• wherein an inside diameter of said sound guide tube is sized so that more of a low frequency component of said acoustic signals is conducted in said sound guide tube than higher frequency components of said acoustic signals.

An electro-acoustic apparatus, comprising:

• an electro-acoustic transducer having a sound radiating side and a rear side opposite said sound radiating side, said electro-acoustic transducer for converting electrical signals into acoustic signals;
• a cabinet for enclosing said rear side of said electro-acoustic transducer but not said sound radiating side;
• a sound guide tube having one end connected to said cabinet and another end for insertion within an external acoustic meatus of a user;
• wherein an outside diameter of said sound guide tube is smaller than an inside diameter of said external acoustic meatus and said another end of said sound guide tube is spaced from said external acoustic meatus to allow the passage of acoustic signals from a secondary source through said external acoustic meatus.