这种频率属于极低频的频率范围内，通常极低频的频带范围也在300hz以下。

This falls in the extremely low frequency (ELF) range which includes frequencies up to 300 Hz.

youdao

他把低音单元按“口味”放置在鼓皮外低频比较有密度的地方—简单的移动直到你听到最自然的低频为止。

He positions the woofer to taste on the outside head in which the low frequencies are thick - simply move around until you hear the most natural low frequencies.

youdao

为促进组织修复的重要频率在生物的重要极低频所有(低频)的范围。

The important frequencies for stimulating tissue repair are all in the biologically important extremely low frequency (ELF) range.

youdao

We had that very interesting piece last time, "Polish Oxcart" where he used this principle of low sounds produce sound waves that stay forever and we hear those low sounds first and last.

上次我们听了一段很有意思的曲子,《牛车》,当时他运用低频声音,持续时间长的原理,我们在最初和最后听到的都是低音

耶鲁公开课 - 聆听音乐课程节选