Fit.
The shell can be shaped around the customer's own ear geometry rather than relying on a generic universal shell.
HAMMER CRAFT / CUSTOM FIT
Custom Fit.
The Hammer Craft reference sound, built into a shell generated around the geometry of your own ears.
HAMMER CRAFT
CUSTOM FIT
PRODUCT IMAGE
01
OVERVIEW
Same sound. Different geometry.
Custom Fit keeps the Hammer Craft reference response while changing the physical shell from a universal shape to an ear-specific one.
The shell is developed from reconstructed ear geometry, then refined in CAD around acoustic layout, driver placement and fit.
WHY CUSTOM FIT
Built around one pair of ears.
Stability.
Ear-specific geometry can improve positional stability during movement when the scan and shell are prepared correctly.
Internal space.
Custom geometry can also provide a different internal volume and layout envelope for the acoustic system.
DIGITAL EAR CAPTURE
Photograph the geometry.
Many overlapping views.
The customer follows a guided image-capture path around the ear so that the same physical features appear across many neighbouring frames.
The goal is not to take one perfect photograph. The goal is to create enough visual overlap for the reconstruction system to estimate camera positions and recover three-dimensional geometry.
Full pass.
The left ear is captured as its own reconstruction dataset.
Separate pass.
The right ear is captured and reconstructed independently.
Continuity matters.
Sequential images should share enough common detail for reliable feature matching.
02
CAPTURE QUALITY
BETTER INPUT
Reconstruction starts with the scan.
The quality of the final geometry depends heavily on the quality and consistency of the captured image sequence.
LIGHTING
Even and stable
FOCUS
Sharp ear detail
CAMERA MOVEMENT
Slow and continuous
SUBJECT MOVEMENT
Keep the head still
COVERAGE
Multiple angles around the ear
03
RECONSTRUCTION
PHOTOGRAMMETRY
Images become geometry.
The reconstruction worker identifies visual features across the image sequence and estimates how the camera moved around the ear.
Sparse geometry is reconstructed first, followed by denser depth information and surface generation.
Distinct image features are detected across the scan sequence.
Corresponding visual features are matched between neighbouring views.
The reconstruction estimates where each image was captured from.
Depth and surface information are generated from the registered image set.
MESH PROCESSING
Reconstruction is not the final shell.
Clean before CAD.
Photogrammetry can generate disconnected geometry, holes, irregular triangles and surfaces that are unsuitable for direct manufacturing.
The reconstruction therefore passes through a mesh-cleanup workflow before it is used as an anatomical reference.
Remove noise.
Small disconnected mesh components can be removed from the reconstruction.
Close defects.
Mesh repair can correct winding, normals and recover some open areas.
Create usable volume.
Where necessary, the geometry can be converted into a clean closed representation for downstream processing.
DIGITAL FIT
EAR GEOMETRY
CAD REFERENCE
The STL is the start, not the product.
Reconstructed ear geometry is used as an anatomical reference for shell development.
The final IEM shell still needs to account for comfort, insertion depth, nozzle placement, wall thickness, driver volume and internal acoustic routing.
CUSTOM SHELL CAD
Anatomy meets acoustic layout.
Fit cannot be designed alone.
A custom shell must still contain the complete acoustic and electrical system.
Driver placement, tubing, acoustic dampers, connectors, chamber volume and nozzle structures all have to coexist within the available anatomical envelope.
Position.
Ear geometry influences possible nozzle direction and insertion geometry.
Thickness.
Shell walls must balance available internal space against physical strength.
Closure.
The final shell needs a repeatable interface for assembly and sealing.
ADDITIVE MANUFACTURING
From CAD to resin.
The completed shell geometry can be prepared for resin additive manufacturing.
Orientation, supports, drainage, layer height, resin exposure and post-processing all affect the quality of the final printed shell.
MANUFACTURING
RESIN PRINTING
04
SOUND
HC REFERENCE
Custom fit does not mean custom tuning.
Custom Fit uses the Hammer Craft reference sound rather than a customer-edited target.
This is the appropriate route when the customer wants an ear-specific shell but prefers the standard Hammer Craft tuning.
Ear-specific shell geometry.
Fixed Hammer Craft target response.
Both ears require a usable reconstruction.
Use Full Custom if you want both.
CUSTOM FIT WORKFLOW
From scan to finished shell.
Capture.
Complete the guided left and right ear image sequences.
Reconstruct.
The local processor reconstructs each ear from the uploaded images.
Clean.
Reconstructed meshes are repaired and prepared as anatomical references.
Design.
The IEM shell is developed around both the ear and the internal acoustic architecture.
Print.
Shell parts are manufactured and post-processed.
Assemble.
The reference acoustic system is installed into the custom shell.
TECHNICAL
Specifications.
MODEL
Hammer Craft Custom Fit
FIT
Ear-specific
TUNING
HC Reference
DIGITAL EAR SCAN
Required
SHELL DEVELOPMENT
Ear reconstruction + CAD
SHELL
Additive-manufactured resin
CONNECTOR
2-Pin
PRODUCTION
Made to order
LOCATION
Bristol / United Kingdom
QUESTIONS
Custom Fit FAQ.
Do I need an account to read about Custom Fit?
No. Product information is public.
Do I need an account to scan my ears?
An account is recommended before submitting a real production scan so the resulting geometry can be securely associated with the correct customer and order.
Is the reconstructed STL printed directly?
No. The reconstructed geometry is an anatomical reference. The final IEM shell still requires dedicated CAD development.
Does Custom Fit also change the tuning?
No. Custom Fit uses the Hammer Craft reference tuning. For both custom fit and custom sound, choose Custom Fit + Tune.
What happens if the scan quality is poor?
A reconstruction that does not contain enough usable geometry should be rejected and the customer asked to repeat the scan rather than designing a shell from unreliable anatomy.
DIGITAL FIT
Ready to capture your ears?
The scanner guides you through the image sequence required for left and right ear reconstruction.
SCAN TYPE
Guided image capture
EARS
Left + right
OUTPUT
Reconstructed ear geometry
PRODUCT
Custom Fit
START EAR SCAN
AVAILABILITY
Product status.
PRICE
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STATUS
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ORDERING
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