PRODUCT — 2025

Hôlo

A sports headphone and speaker duo that harmonizes exercise and recovery.

COURSE — METU ID302 TERM — 2024–2025 Spring DURATION — 7 weeks
TEAM
Deniz Afşar · Ege Keskin · Mehmet Kala · Meriç Ayaz
Hôlo headphone and speaker duo, final render
00

The Project

OVERVIEW

Hôlo pairs a sports headphone with a speaker that doubles as a foam roller — one object for the workout, one for the recovery that follows, sharing a single material and control language.

The move that shaped both bodies was lattice structure: an open, repeating geometry that lets the earcup cushion breathe and pass sweat where a sealed foam pad traps both.

CATEGORY
Sports audio & recovery
KEY MOVE
Lattice cushion for airflow
OUTCOME
Resolved concept, 7-week studio project
01

Use Scenarios

STORYBOARD — 6 FRAMES
Commuter on a bus swapping in foam cushions
01
Foam cushions for the commute, switched out
Runner adjusting earcup controls mid-run
02
Intuitive adjustments and mode change on the run
Runner hearing a dog bark through transparency mode
03
Transparency mode
Stretching beside the speaker, using voice commands
04
Stretching with voice commands
Using the speaker as a foam roller on the calf
05
Massage and rehab
Washing the lattice cushions under a tap
06
Easily washable
Storyboard illustrations by Deniz Afşar.
02

Concept Development

SKETCH → CLAY → PRINT → FIELD TEST

From anthropometric baseline through sketch iteration on both bodies, clay ear proofing, 3D-printed lattice and shell mock-ups, and finally field testing in use.

01 Head and ear dimensioning
APPROACH

Head and ear dimensions were pulled from DINED before any form work started, so the earcup and headband are sized to cover the 5th-to-95th percentile range rather than a single assumed head.

02 Earcup form iterations, six variants
03 Speaker form iterations
04 Resolved headphone and speaker duo
05 Clay ear study, earcup cavity
Clay ear study, ear geometry
Speaker mock-up, control face
3D-printed elastic lattice earcup trial
Headphone physical mock-up
Speaker mock-up, textured shell
06
Headphone worn on a trail Headphone worn while tying running shoes Speaker used as a foam roller
03

Final Renders

9 RENDERS
Hôlo headphone and speaker duo
Lattice cushion detail
Headband cross-section
Headphone folded flat
Speaker control face
Earcup control mapping
Speaker full body
Earcup with cushion detached
Speaker end cap