Abstract: A loudspeaker cone body made of paper may include a chemically-bound nanomaterial, such as a carbon nanotube. The carbon nanotube may be chemically bound to a functionalizing agent having a chemical group chemically bound to one or more papermaking additives, such as a sizing agent or a wet strength agent, a dry strength agent, a resin or cellulose-containing papermaking stock material typically present in a paper loudspeaker cone body, such as pulp. Acoustic-related loudspeaker performance characteristics such as stiffness to weight ratio and an acoustic damping of the loudspeaker cone body may be altered by incorporation of the nanomaterials chemically bound to the loudspeaker cone body.

Abstract: A loudspeaker cone body made of plastic includes a base carrier material and a filler material. The base carrier material is selected to optimize overall flow, weight and stiffness. The filler material may be a nanomaterial that provides for adjustment of process and acoustic related characteristics in the loudspeaker cone body that become relevant when the loudspeaker cone body is operated in a loudspeaker. Acoustic related characteristics that may be adjusted include a stiffness to weight ratio and an acoustic damping of the loudspeaker cone body. A predetermined weight percent of the filler material may be combined with the base carrier material to obtain repeatable desired acoustic related characteristics. The acoustic related characteristics may be adjusted by changing the predetermined weight percent of the filler material.

Abstract: A loudspeaker cone body made of paper may include a chemically-bound nanomaterial, such as a carbon nanotube. The carbon nanotube may be chemically bound to a functionalizing agent having a chemical group chemically bound to one or more papermaking additives, such as a sizing agent or a wet strength agent, a dry strength agent, a resin or cellulose-containing papermaking stock material typically present in a paper loudspeaker cone body, such as pulp. Acoustic-related loudspeaker performance characteristics such as stiffness to weight ratio and an acoustic damping of the loudspeaker cone body may be altered by incorporation of the nanomaterials chemically bound to the loudspeaker cone body.

Abstract: A method of making a moving coil transducer by wrapping an electrical conductor around a thread and weaving the wrapped thread at a selected location in a cloth with an overshot region. The cloth is formed into a spider with a region of the cloth adjacent the overshot region as a perimeter of the spider. The spider is incorporated into the moving coil transducer. Electrical contact is made to a moving coil of the moving coil transducer through the electrical conductor wrapped around the thread.

Abstract: A moving coil transducer is produced by wrapping an electrical conductor around a thread and weaving the wrapped thread at a selected locating in a cloth with an overshot region. The cloth is formed into a spider with a region of the cloth adjacent the overshot region as a perimeter of the spider. The spider is incorporated into the moving coil transducer. Electrical contact is made to a moving coil transducer through the electrical conductor wrapped around the thread.

Abstract: A method of making a speaker comprises providing a pair of dies which define between them a cavity. A first portion of the cavity receives a diaphragm of the speaker. A second portion of the cavity adjacent an outer perimeter of the diaphragm receives a fluid thermoplastic elastomer for forming a diaphragm surround. The second portion includes a perimetrally inner first region adjacent the outer perimeter of the diaphragm for receiving the thermoplastic elastomer to form a perimetrally inner flange for bonding to the diaphragm adjacent the outer perimeter of the diaphragm. The second portion includes a central second region for receiving the thermoplastic elastomer to form a connecting arch of the surround. The second portion also includes a perimetrally outer third region for receiving the thermoplastic elastomer to form a perimetrally outer flange for attachment to a diaphragm support. A diaphragm is placed between the dies. The dies are closed.

Abstract: A phosphorylatedpolystyrene having a phosphorus group bonded to a phenyl group by an intervening methylene-amido alkane group and being substantially non-crosslinked. The phosphorylated polystyrene is formed by a one-step process.

Abstract: A flame-resistant, thermoplastic copolymer of styrene and phosphorylated styrene having a phosphorus group bonded to a phenyl group by an intervening methylene group and being substantially non-crosslinked.