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fréquence basse
earth.sc.	deep tone
phonol.	low frequency

fréquence basse: 116 phrases in 26 subjects

Astronomy	1
Automated equipment	1
Aviation	2
Chemistry	1
Communications	28
Construction	1
Earth sciences	5
Electric motors	1
Electronics	37
Environment	1
Fishery fishing industry	1
General	1
Health care	2
Information technology	5
Mechanic engineering	1
Medical	2
Medical appliances	11
Metallurgy	2
Natural sciences	2
Physical sciences	1
Power lines	1
Remote sensing	1
Technology	4
Telecommunications	1
Transport	2
Video recording	1