JOHN P D'ANGELO
Engineering in Medford, MA
License number
Massachusetts 20392
Type
Engineer in Training
Address
Address
Medford, MA 02155
Professional information
Apparatus And Method For Aerosol Collection And Fluid Analysis
US Patent:
2013006, Mar 21, 2013
Filed:
Sep 21, 2011
Appl. No.:
13/238399
Inventors:
John P. D'Angelo - Medford MA, US
Assignee:
MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA
International Classification:
G01N 1/22, B67D 7/06
US Classification:
73 2804, 7386321, 222 1
Abstract:
An apparatus for aerosol collection and fluid analysis includes a rotary motor, an aerosol-collection disk configured for mounting on the rotary motor, and a fluid-analysis disk that is also configured for mounting on the rotary motor. The aerosol-collection disk includes at least one interior inlet, at least one peripheral outlet and a passage coupling the interior inlet with the peripheral outlet, and a particle collector opposite the peripheral outlet. The fluid-analysis disk includes at least one fluid in each of a first reservoir and in a second reservoir on or in the fluid-analysis disk and offset from a central axis of the disk, wherein each reservoir has an outlet and a stopper in the outlet of each reservoir to seal the reservoirs; and release of the fluids from the reservoirs is spin-induced.
Noise Reduction Tubes
US Patent:
7497300, Mar 3, 2009
Filed:
Mar 18, 2005
Appl. No.:
11/084400
Inventors:
John P. D'Angelo - Medford MA, US
International Classification:
F01N 1/16, F02K 1/06
US Classification:
181241, 181216, 181215, 181219, 181253, 181271, 181206, 181277, 181278, 181226, 181196, 181197, 415119, 244 1 N, 244 53 B
Abstract:
The invention uses tubes for the reduction of radiated duct noise. The tubes may be used to attenuate narrow band noise by diverting a portion of the acoustic energy through the tubes back into the duct. Upon reintroducing the diverted flow out of phase with the primary flow, acoustic cancellation is achieved. The frequency at which this occurs is dependent on the difference in the path lengths through the tubes and the separation distance—the distance separating the inlet and outlet of the tube. This invention can be used over varying frequency ranges by using an arrangement of flexible, constant length tubes. The effective frequency range is tailored by varying the separation distance and also allows the varying the angular arrangement of the tubes for more effective attenuation of spinning modes having varying propagation angle.
Noise Reduction Tubes
US Patent:
7533760, May 19, 2009
Filed:
Jun 16, 2008
Appl. No.:
12/214057
Inventors:
John P. D'Angelo - Medford MA, US
International Classification:
F01N 1/16, F01K 1/06
US Classification:
181241, 181196, 181197, 181215, 181216, 181219, 181226, 181253, 181254, 181271, 415119, 244 1 N, 244538
Abstract:
The invention uses tubes for the reduction of radiated duct noise. The tubes may be used to attenuate narrow band noise by diverting a portion of the acoustic energy through the tubes back into the duct. Upon reintroducing the diverted flow out of phase with the primary flow, acoustic cancellation is achieved. The frequency at which this occurs is dependent on the difference in the path lengths through the tubes and the separation distance—the distance separating the inlet and outlet of the tube. This invention can be used over varying frequency ranges by using an arrangement of flexible, constant length tubes. The effective frequency range is tailored by varying the separation distance and also allows the varying the angular arrangement of the tubes for more effective attenuation of spinning modes having varying propagation angle.
Suppression Of Tinnitus
US Patent:
2005025, Nov 10, 2005
Filed:
May 9, 2005
Appl. No.:
11/125949
Inventors:
John D'Angelo - Medford MA, US
International Classification:
A61N001/18
US Classification:
607057000
Abstract:
The perception of sound in the absence of a stimulus external to one's own ear is commonly referred to as “tinnitus”. However, other sounds such as otoacoustic emissions, may occur in the absence of an external stimulus. These sounds may be audible or inaudible. A means of reducing such sounds is presented. For the audible case, the device first measures the sound and then injects a sound of proper frequency content thus canceling the tinnitus or otoacoustic emission. The inaudible case requires other means of sensing the perceived sound. Suppression of the noise perceived by one suffering from inaudible tinnitus is outlined. Such a response may be processed similar to the microphone signal acquired for the audible case. Sound of proper frequency content is then injected into the affected ear and the neurological response due to the generated sound would then cancel the inaudible tinnitus.