Definition of modulational in English:
modulational
adjective
Of or relating to modulation.
Pronunciation
modulational
/ˌmɒdjʊˈleɪʃ(ə)n(ə)l/ /ˌmɒdjʊˈleɪʃn(ə)l/ /ˌmɒdʒʊˈleɪʃ(ə)n(ə)l/ Origin
1960s; earliest use found in Harold Conklin (b. 1926). From modulation + -al.