Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves
AssigneeNXP B.V.
InventorEwald Frasl
Life of this patent
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Abstract
A membrane (20) has a membrane axis (5) and a middle area (50), a central cup-shaped depression (52) being provided around said membrane axis (5), which depression (52) preferably has a connecting channel (53), wherein the middle area (50) comprises groups of stiffening grooves (54, 55, 56, 57) which extend parallel to radial directions and of which a first group of long stiffening grooves (54, 55, 56) extends up to the depression (52), said connecting channel (53) issuing into two of the long stiffening grooves (55, 56), thus interconnecting these two long stiffening grooves (55, 56).
Claims11
A membrane for an electroacoustic transducer, which membrane is designed to be capable of vibration with respect to a membrane axis, and which has a first membrane side and a second membrane side, and which has a middle area,
- wherein a central cup-shaped depression is present in the region of the membrane axis, which depression is bounded by a cup bottom wall and is open towards the first membrane side,
- wherein the membrane has stiffening grooves in its middle area which stiffening grooves extend substantially parallel to radial directions, and
- wherein at least two stiffening grooves of said stiffening grooves extend up to the depression.
Dependencies are inferred from the claim text.