Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Patent
1998-02-24
2000-11-07
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
381349, 381351, 181153, H04R 2500
Patent
active
06144751&
ABSTRACT:
The latest advances in speaker driver design have resulted in high output drivers with superior low frequency response, power handling, and linear excursion than conventional drivers. These new drivers present further problems to enclosure design due to large port surface area and long port length requirements. The present invention wraps a port completely around an enclosure, maximizing port surface area and placing the consequently lengthy port in a more practical position. The port of the present invention converts a circular cross-section to an annular cross-section with constant cross-sectional surface area, thus integrating a large port into an enclosure without a large dimensional increase. In one embodiment, a bandpass configuration demonstrated a reduction in port air displacement and noise. Response deviations in the present invention due to flaws in construction and open pipe resonance can be alleviated through the use of plastics and filters, respectively. The present invention is practical for high power applications (greater than 1,000 watts per driver) which require high output and superior frequency response, such as professional sound reinforcement systems.
REFERENCES:
patent: 4298087 (1981-11-01), Launay
patent: 5189706 (1993-02-01), Saeki
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