Việt
hạ âm
hạ âm.
Anh
infrasound
infrasonic sounds
infrasonic noise
Đức
Infraschall
Pháp
infra-sons
infrason
bruit infra-sonore
Infraschall /m -(e)s, -e u -schalle (vật lí)/
Infraschall /m/ÂM, V_LÝ/
[EN] infrasound
[VI] hạ âm
Infraschall /SCIENCE/
[DE] Infraschall
[FR] infra-sons
[EN] infrasonic sounds
[FR] infrason
Infraschall /INDUSTRY,INDUSTRY-CHEM/
[EN] infrasonic noise
[FR] bruit infra-sonore