Transducer and electronic device including the same
US-9516420-B2 · Dec 6, 2016 · US
Magnetically controllable transducer backing component
US9602915B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9602915-B1 |
| Application number | US-201514870146-A |
| Country | US |
| Kind code | B1 |
| Filing date | Sep 30, 2015 |
| Priority date | Sep 29, 2011 |
| Publication date | Mar 21, 2017 |
| Grant date | Mar 21, 2017 |
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- Title
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- Abstract
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Abstract
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A transducer is provided that converts energy between two forms using active components. The transducer also includes passive components in contact with the active components that perform passive component functions separate from the energy conversion function. The passive components include ferrofluids and have elastic properties that are modifiable by exposure of the passive component to a magnetic field to selectively control the energy conversion function.
First claim
Opening claim text (preview).
What is claimed is: 1. A transducer for use in an underwater environment, said transducer comprising: a plurality of active components with each of said active components having an energy conversion function for a transmit mode and a receive mode; a plurality of passive components with each of said passive components in adhesive contact, electrical contact and fluid communication with each of said active components and with each of said passive components comprising an amount of ferrofluid, said passive components having a passive component function separate from said energy conversion function of said active components; a plurality of coils of wire, with each of said coils of wire encompassing each of said passive components; and a mountable housing encapsulating said active components, said passive components and said coils; wherein each of said active components is positioned as an alternating layer to each of said passive components; wherein an elastic property of each of said passive components is modifiable by exposure to a magnetic field generated by each of said coils of wire to select a backing stiffness that enables the energy conversion function of each of said active components in the transmit mode and the receive mode and wherein the elastic property of each of said passive components includes yield strength, stress, strain, elastic modulus and viscosity; wherein nanoparticles of said amount of ferrofluid consists of iron, iron oxide, iron cobalt, iron nickel, iron silicon and iron nitride.
Assignees
Inventors
Classifications
for electronic or optoelectronic application · CPC title
- H04R1/2834Primary
for loudspeaker transducers · CPC title
for microphones (H04R1/24, H04R1/26 take precedence) · CPC title
- H04R13/00Primary
Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet · CPC title
Special adaptations for subaqueous use, e.g. for hydrophone · CPC title
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Frequently asked questions
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- What does patent US9602915B1 cover?
- A transducer is provided that converts energy between two forms using active components. The transducer also includes passive components in contact with the active components that perform passive component functions separate from the energy conversion function. The passive components include ferrofluids and have elastic properties that are modifiable by exposure of the passive component to a ma…
- Who is the assignee on this patent?
- Howarth Thomas R, Benjamin Pamela, Us Navy
- What technology area does this patent fall under?
- Primary CPC classification H04R1/2834. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 21 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).