Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2011-07-12
2011-07-12
Ensey, Brian (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S059000
Reexamination Certificate
active
07978873
ABSTRACT:
The present invention provides an acoustic display device for displaying modal patterns in response to sound from a sound source. The display device (10) has a substantially circular housing (12), which housing (12) includes a continuous curved side wall (13a), a substantially flat base wall (13b), and open end (13c). The open end (13c) is closed by diaphragm (14), thereby forming closed chamber (15). Excitation of the diaphragm can be effected by introducing vocal sounds to the underside of the diaphragm via one of a plurality of sound connecting means (22) that include a flexible tubular section (30), which terminates in a mouthpiece (32). A user can place the mouthpiece over their mouth and nose and make vocal sounds, which are delivered to the interior of the chamber (15). The mouthpiece (32) can be substituted with a sound collector (60) having a “horn” shape and an annular flange for engagement with a loudspeaker. The other ends (24) of the sound connecting means (22), within the closed chamber (15), each contain a non-return valve so that pressure within the chamber is maintained. The device can also include weight locating means (21a, 21b, 21c) or magnetic tensioning means (80, 84) for tuning the diaphragm. Removable covers having different markings can assist in analysing the patterns produced. Two or more integral curved spirit levels (38) in conjunction with adjustable feet (40) enable accurate levelling of the diaphragm.
REFERENCES:
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International Search Report for PCT/GB2006/003917 mailed Jan. 4, 2007.
British Search Report dated Dec. 1, 2005, issued in connection with British Application No. GB0521372.3.
Ensey Brian
Nixon & Vanderhye P.C.
Sonic Age Ltd.
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