# Are you interested in my headphone design project? It's been challenging

**URL:** <https://discourse.shapr3d.com/t/are-you-interested-in-my-headphone-design-project-its-been-challenging/28956>\
**Category:** Modeling Questions\
**Created:** [November 17, 2023, 11:41am UTC](https://discourse.shapr3d.com/t/are-you-interested-in-my-headphone-design-project-its-been-challenging/28956 "2023-11-17T11:41:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![liwang](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@liwang](https://discourse.shapr3d.com/u/liwang)\
**Post date:** [November 17, 2023, 11:41am UTC](https://discourse.shapr3d.com/t/are-you-interested-in-my-headphone-design-project-its-been-challenging/28956/1 "2023-11-17T11:41:36Z")

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Hello, I’m preparing some files including ear profile files in STL and STEP  
formats. My goal is to create a new entity by subtracting entities and then use the new entity to generate the shell for the earphone.I am trying to create a unique pair of headphones using a three-dimensional scanned STL file with the help of Shapr3D. In the first step, I imported the scanned STL file of the ear shape into Shapr3D and converted it into a solid entity. Although it has been imported as a solid file, it still appears as a thin mesh. In Shapr3D, I can easily trim and scale this thin solid that looks like a mesh file. However, I am unable to use Boolean operations to subtract and extract the desired parts of the headphones.  
[Unnamed-AnyConv\_com\_\_Ear\_obj001.shapr](https://discourse.shapr3d.com/uploads/short-url/pLI9ExeTkgk2pcvcUKeqxfO5xO4.shapr) (13.4 MB)

 ![屏幕截图 2023-11-17 191037](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/4/f420eb70735cdecab68b6c7899c2bad971aaa679.jpeg)  
 ![屏幕截图 2023-11-17 184915](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/7/377b92807fd95b8728b162af584e78666de4e8ae.jpeg)