# US 8,540,049 B2 · Acoustic diaphragm suspending

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- Number: US 8,540,049 B2
- Document ID: US8540049B2
- Status: Granted
- Kind: B2
- Application number: 12/977,484
- Filed: 2010-12-23
- Published: 2012-06-28
- Granted: 2013-09-24
- Earliest claimed: 2010-12-23
- Assignees: Bose Corporation
- Applicants: Jason D. Silver
- Inventors: Jason D. Silver
- Web page: https://patentgrep.com/patent/US8540049B2

## CPC

- H04R 7/02: characterised by the construction
- H04R 7/20: Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
- H04R 31/006: {Interconnection of transducer parts (of diaphragm and outer suspension by moulding H04R31/003)}
- H04R 2231/003: Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
- H04R 2307/204: Material aspects of the outer suspension of loudspeaker diaphragms
- H04R 2307/207: Shape aspects of the outer suspension of loudspeaker diaphragms
- 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)

## Abstract

A suspension element for mechanically coupling an acoustic diaphragm to a stationary element. The suspension element is characterized by a total compliance. The total compliance includes a shear compliance and a beam compliance. The beam compliance is not significantly larger than the shear compliance.

## Claims

### Claim 1

A suspension element for mechanically coupling an acoustic diaphragm to a stationary element characterized by a total compliance, wherein the total compliance comprises a shear compliance and a beam compliance wherein the beam compliance is calculated according to the equation:
_
⁢
C
beam
=
0.75
⁢
w
3
Elt
3
,
where w is the width, t is the thickness, l is the length of the circumferential axis of the suspension element, and E is Young's modulus, and the shear compliance is calculated according to the equation:
_
⁢
C
shear
=
2
⁢
(
1
+
v
)
⁢
w
Elt
,
where v is Poisson's ratio, and;
wherein the beam compliance is not significantly larger than the shear compliance.

### Claim 2 (depends on 1)

The suspension element of claim 1, wherein the shear compliance is greater than the beam compliance.

### Claim 3 (depends on 1)

The suspension element of claim 1, wherein the material of the suspension element has a Young's modulus of about 0.031 MPa.

### Claim 4 (depends on 1)

The suspension element of claim 1, wherein the material of the suspension element is silicone rubber.

### Claim 5 (depends on 4)

The suspension element of claim 4, wherein the material is silicone rubber treated with a softening agent.

### Claim 6 (depends on 1)

The suspension element of claim 1, wherein the material of the suspension element is a polyurethane.

### Claim 7 (depends on 1)

The suspension element of claim 1, wherein the suspension element and the diaphragm are components of a passive radiator.

### Claim 8 (depends on 1)

The suspension element of claim 1, the suspension element comprises flanges for capturing the acoustic diaphragm.