However, species in the genus Brachyhypopomus restrict the low-frequency spectrum of their electric field close to their bodies, allowing higher frequencies to spread further; this makes it more difficult for predators to detect them.
haʊˈɛvɚ, spˈiːsiːz ɪnðə dʒˈɛnəs bɹˈækɪhˌɪpəpˌɑːməs ɹᵻstɹˈɪkt ðə lˈoʊfɹˈiːkwənsi spˈɛktɹəm ʌv ðɛɹ ᵻlˈɛktɹɪk fˈiːld klˈoʊs tə ðɛɹ bˈɑːdiz, ɐlˈaʊɪŋ hˈaɪɚ fɹˈiːkwənsiz tə spɹˈɛd fˈɜːðɚ; ðɪs mˌeɪks ɪt mˈoːɹ dˈɪfɪkəlt fɔːɹ pɹˈɛdəɾɚz tə dɪtˈɛkt ðˌɛm.