# US 7,609,844 B2 · Noise attenuating headset

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- Number: US 7,609,844 B2
- Document ID: US7609844B2
- Status: Granted
- Kind: B2
- Application number: 11/851,860
- Filed: 2007-09-07
- Published: 2008-01-17
- Granted: 2009-10-27
- Earliest claimed: 2003-10-27
- Inventors: Wayne Lederer
- Web page: https://patentgrep.com/patent/US7609844B2

## CPC

- G01R 33/283: {Intercom or optical viewing arrangements, structurally associated with NMR apparatus}
- H04R 5/033: Headphones for stereophonic communication {(details thereof, e.g. relating to batteries, cables or control elements H04R1/10)}
- A61F 11/145: {electric, e.g. for active noise reduction}
- H04R 17/02: Microphones
- H04R 23/008: {using optical signals for detecting or generating sound}
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

Systems and techniques are disclosed for a headset that may be used in an audio system used in a magnetic field. In one aspect, the system includes an inner set portion adapted to fit into an ear canal. A pneumatic port is disposed in the hole to couple audible sounds to the ear canal. The system may include a non-magnetic transducer coupled to the pneumatic port. The system also may include a fiber-optic microphone to couple sound from a user of the headset. Other techniques provide a stethoscope-type yoke to couple the pneumatic port and the fiber-optic antenna to the non-magnetic transducer.

## Claims

### Claim 1

A magnetically inert headset comprising:
an ear insert having a through-hole and adapted to fit into an ear canal;
a pneumatic port disposed in the hole in the ear insert to receive audible sound waves and couple the sound waves to the ear canal;
a non-magnetic microphone coupled to the headset; and
a stethoscope-type yoke, wherein the yoke includes pneumatic tubing acoustically coupled to both the pneumatic port and a non-magnetic transducer to couple the audible sound waves from the non-magnetic transducer.

### Claim 2 (depends on 1)

The headset of claim 1 wherein the non-magnetic transducer comprises an audio transducer disposed in a magnet room of a magnetic resonance imaging system.

### Claim 3 (depends on 1)

The headset of claim 1 wherein the non-magnetic transducer comprises a piezoelectric transducer.

### Claim 4 (depends on 1)

The headset of claim 1 wherein the non-magnetic transducer comprises an electrostatic transducer.

### Claim 5

A magnetically inert headset comprising:
an ear insert having a through-hole and adapted to fit into an ear canal;
a pneumatic port disposed in the hole in the ear insert to receive audible sound waves and couple the sound waves to the ear canal; and
a stethoscope-type yoke, wherein the yoke includes pneumatic tubing acoustically coupled to both the pneumatic port and a non-magnetic transducer to coupled the audible sound waves from the non-magnetic transducer.

### Claim 6 (depends on 5)

The headset of claim 5 wherein the non-magnetic transducer comprises an audio transducer disposed in a magnet room of a magnetic resonance imaging system.

### Claim 7 (depends on 5)

The headset of claim 5 wherein the non-magnetic transducer comprises a piezoelectric transducer.

### Claim 8 (depends on 5)

The headset of claim 5 wherein the non-magnetic transducer comprises an electrostatic transducer.