Systems and methods for providing low-noise positive airway pressure
First Claim
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1. A noise attenuating system for use with ventilation or other systems providing a flow of gas comprising:
- an expansion chamber having a volume;
an intake tube having an inlet and outlet port separated by a length, wherein a portion of the inlet port extends outside of the expansion chamber;
a noise attenuator having a bottom and protruding sidewall forming a cavity, wherein the noise attenuator is positioned over the inlet portion of the intake tube such that a portion of the intake tube extends into the cavity portion of the noise attenuator; and
a first acoustic deflector positioned near the outlet port of the intake tube, wherein a surface of the acoustic deflector facing the outlet port of the intake tube being positioned so as to form an acute angle between the surface of the acoustic deflector and a proximate sidewall of the expansion chamber from which the intake tube extends, wherein noise is deflected away from the outlet port of the intake tube.
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Abstract
The systems and methods described herein include a low-noise apparatus for providing positive air pressure to a patient. The systems may include a housing with an inlet port, a vibrationally isolated blower unit positioned in an acoustic chamber, and an outlet port for delivery of the pressurized air from the blower unit. The acoustic chamber may include noise attenuators, such as walls, which adjust airflow so as to reduce the overall noise output of the system.
22 Citations
26 Claims
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1. A noise attenuating system for use with ventilation or other systems providing a flow of gas comprising:
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an expansion chamber having a volume; an intake tube having an inlet and outlet port separated by a length, wherein a portion of the inlet port extends outside of the expansion chamber; a noise attenuator having a bottom and protruding sidewall forming a cavity, wherein the noise attenuator is positioned over the inlet portion of the intake tube such that a portion of the intake tube extends into the cavity portion of the noise attenuator; and a first acoustic deflector positioned near the outlet port of the intake tube, wherein a surface of the acoustic deflector facing the outlet port of the intake tube being positioned so as to form an acute angle between the surface of the acoustic deflector and a proximate sidewall of the expansion chamber from which the intake tube extends, wherein noise is deflected away from the outlet port of the intake tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15)
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12. A noise attenuating system for use with ventilation or other systems providing a flow of gas comprising:
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an expansion chamber having a volume; an intake tube having an inlet and outlet portion separated by a length, wherein a portion of the inlet port extends outside of the expansion chamber; and a first acoustic deflector positioned near the outlet port of the intake tube extending from a proximate sidewall of the expansion chamber, wherein the first acoustic deflector is positioned near the outlet port of the intake tube, wherein a surface of the first acoustic deflector is facing the outlet port of the intake surface being positioned so as to have an acute angle between the surface and the proximate sidewall of the expansion chamber from which the acoustic deflector extends, wherein noise is deflected away from the outlet port of the intake tube. - View Dependent Claims (13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A positive air pressure apparatus, comprising:
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a housing; an intake chamber positioned within the housing, the intake chamber having an intake vent positioned on an interior wall of the housing and an attenuator, wherein the attenuator is positioned within the intake chamber; an acoustic chamber positioned within the housing and separated from the intake chamber by a chamber wall; an inlet port coupling the intake chamber and acoustic chamber through the chamber wall; a blower unit positioned in the acoustic chamber; and wherein the acoustic chamber further comprises a first acoustic deflector positioned near an outlet port of the intake tube extending from a proximate sidewall of the acoustic chamber, wherein the first acoustic deflector is positioned near the outlet port of the intake tube, wherein a surface of the first acoustic deflector facing the outlet port of the intake tube is positioned thereby forming an acute angle between the surface of the first deflector and the proximate sidewall of the acoustic chamber.
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26. A positive air pressure apparatus, comprising:
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a housing, wherein the housing defines a first and a second acoustic chamber, the first acoustic chamber having a first inlet port, and the second acoustic chamber having a second inlet port, wherein the first inlet port extends through an exterior wall of the housing and the second inlet port extends from the first acoustic chamber into the second acoustic chamber; an attenuator positioned in the first acoustic chamber; a blower unit positioned within the second acoustic chamber; and wherein the acoustic chamber further comprises a first acoustic deflector positioned near an outlet port of the intake tube extending from a proximate sidewall of the expansion chamber, wherein the first acoustic deflector is positioned near the outlet port of the intake tube, wherein a surface of the first acoustic deflector is facing the outlet port of the intake tube being positioned so as to form an acute angle between the surface and the proximate sidewall of the acoustic chamber, wherein noise is deflected away from the outlet port of the intake tube.
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Specification