Piezo sounder with cover12/9/2023 A piezoelectric sounder according to claim 1, wherein the piezoelectric sounder has no resonance point in the frequency range of the signal, and wherein the frequency range of the signal exists between resonance frequencies (fr) and antiresonance frequencies (fa). H04R2499/11- Transducers incorporated or for use in hand-held devices, e.g.H04R2499/00- Aspects covered by H04R or H04S not otherwise provided for in their subgroups.strengthening or shape of the enclosure for loudspeaker transducers of the enclosure itself by means of the enclosure structure, i.e. standing waves within enclosure, or of undesired vibrations, i.e. H04R1/2888- Reduction of undesired resonances, i.e.H04R1/2884- Reduction of undesired resonances, i.e. H04R1/2869- Reduction of undesired resonances, i.e.resonator, damping means for loudspeaker transducers H04R1/2803- Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g.H04R1/28- Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g.H04R1/22- Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only.H04R1/20- Arrangements for obtaining desired frequency or directional characteristics.H04R1/00- Details of transducers, loudspeakers or microphones.adapted to produce maximum output at a predetermined frequency H04R17/00- Piezo-electric transducers Electrostrictive transducers.H04R- LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS.Assignors: KIJIMA, KAORU, SATOH, AKIRA Publication of US20140086436A1 publication Critical patent/US20140086436A1/en Application granted granted Critical Publication of US9055373B2 publication Critical patent/US9055373B2/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from JP2012-211202 external-priority Application filed by TDK Corp filed Critical TDK Corp Assigned to TDK CORPORATION reassignment TDK CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee TDK Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Kaoru Kijima Akira Satoh Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number US14/031,724 Other versions US20140086436A1 Google Patents US9055373B2 - Piezoelectric sounderÄownload PDF Info Publication number US9055373B2 US9055373B2 US14/031,724 US201314031724A US9055373B2 US 9055373 B2 US9055373 B2 US 9055373B2 US 201314031724 A US201314031724 A US 201314031724A US 9055373 B2 US9055373 B2 US 9055373B2 Authority US United States Prior art keywords piezoelectric signal sounder resonance piezoelectric sounder Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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