Abstract: The technology described in this document can be embodied in a method that includes receiving one or more electronic files comprising information on structural features of a portion of an ear of a user, generating an electronic representation of the eartip or a cast based on a portion of the information on the structural features of the portion of the ear, and producing the eartip based on the electronic representation. The eartip includes an outlet, and a sealing structure disposed around an exterior of the outlet, wherein a first end of the sealing structure is attached to the outlet, and a second, opposite end of the sealing structure is physically separated from the exterior of the outlet. Generating the electronic representation includes configuring one or more structural parameters of the outlet or the sealing structure in accordance with the structural features of the portion of the ear.

Abstract: A computer-implemented method to create a model used for fabrication of a device configured for placement in an anatomical cavity of a wearer may include first selecting training data and/or testing data by obtaining feedback and data for a plurality of devices fabricated for a plurality of subjects, wherein each of the plurality of devices are fabricated based on a three-dimensional scan of an anatomical cavity of one of the plurality of subjects. The training data set is used to train a machine learning model for transforming a three-dimensional scan of an anatomical cavity to a three-dimensional representation of a device for fabrication.

Abstract: The technology described in this document can be embodied in a method that includes receiving one or more electronic files comprising information on structural features of a portion of an ear of a user, generating an electronic representation of the eartip or a cast based on a portion of the information on the structural features of the portion of the ear, and producing the eartip based on the electronic representation. The eartip includes an outlet, and a sealing structure disposed around an exterior of the outlet, wherein a first end of the sealing structure is attached to the outlet, and a second, opposite end of the sealing structure is physically separated from the exterior of the outlet. Generating the electronic representation includes configuring one or more structural parameters of the outlet or the sealing structure in accordance with the structural features of the portion of the ear.