Translation guide
A diffuser is a device that spreads something out, such as light, sound, air, or scent. This guide covers common Japanese terms for different types of diffusers.
A device that disperses essential oils or fragrance into the air.
The most common and direct term for an aroma diffuser. Widely understood.
アロマディフューザーでラベンダーの香りを楽しんでいます。
I enjoy the scent of lavender with an aroma diffuser.
Literally 'ultrasonic humidifier'. Many aroma diffusers are also ultrasonic humidifiers. Use this if the device primarily functions as a humidifier.
この超音波式加湿器はアロマも使えます。
This ultrasonic humidifier can also be used with aromas.
A more technical term meaning 'fragrance diffuser'. Used in product descriptions or specifications.
業務用の芳香拡散器を導入しました。
We installed a commercial fragrance diffuser.
A device or material that spreads light evenly, reducing harsh shadows or glare.
The loanword 'diffuser' is commonly used in photography and lighting contexts.
ストロボにディフューザーを付けて光を柔らかくします。
I attach a diffuser to the flash to soften the light.
Literally 'diffusion plate'. Used for flat panels or sheets that diffuse light, such as in LCD backlights or studio lighting.
LEDパネルの前に拡散板を設置しました。
We installed a diffusion plate in front of the LED panel.
Specifically 'light diffusion film'. Used in technical or manufacturing contexts.
この光拡散フィルムはディスプレイの輝度ムラを抑えます。
This light diffusion film reduces uneven brightness on displays.
A device or structure that scatters sound waves to improve acoustics in a room.
The standard term for an acoustic diffuser used in studios, concert halls, etc.
壁に音響拡散体を取り付けて音の反射を制御します。
We install acoustic diffusers on the walls to control sound reflections.
Also used in audio contexts, though less specific than 音響拡散体.
このディフューザーは中高域の拡散に効果的です。
This diffuser is effective for diffusing mid-high frequencies.
A vent or grille that distributes conditioned air into a room.
General term for an air supply outlet in HVAC systems.
天井の吹出口から冷気が出ています。
Cool air is coming out of the ceiling diffuser.
More technical term for an air diffuser, often used in specifications.
この空気拡散器は風量調節が可能です。
This air diffuser allows airflow adjustment.
An attachment for a hair dryer that spreads the airflow to dry curly or wavy hair gently.
The standard term in hair care. Often used as ヘアドライヤー用ディフューザー.
ディフューザーを使うとカールがきれいに出ます。
Using a diffuser brings out nice curls.