Perhaps some of you might also have experienced a voice that did not quite fit into a gender-specific category. That is to say, just the sound of the person speaking but without seeing an image of them or specifically, their face. This pitch was in a frequency that would normally be a bit too high for a male but a bit too low for a normal female range. Not trying to stir up anyone's desire to play gender police or politics, merely pointing out my personal observation and perhaps some others as well.
Point being is that at this frequency, I/we are unable to assign a label as to who is speaking or could it even be a child at this point in the discussion?
If a Blork from Blorix speaks with two opposable flaps inside of a hollow mouth-like cavity, it might utter a range of frequencies or flapping, smacking, squeaking, blathering or pulsating buzzing tones, each with their own meaning. And while sounding quite absurd to us, the Blork might actually be a gifted orator on his/her planet.
If the entity is an intelligent being of an artificial nature, it might have the intelligence to know that we are humans and as such, have no comprehension or ability to understand it's native language let alone speak it or communicate with it.
Many years ago we had this exchange student show up on our construction crew for a day along with a few others. Our Foreman did not speak his language at all so he took out a pad and pencil and drew pictures of what he wanted the young man to get for him. With each successful retrieval, the Foreman would say the tool or item's name to the guy and repeated it. The young man would say the tool's name to the Forman in his language. By the end of the day, they had each learned at least a dozen useful tool names. Communication was established. The desire to communicate was all that was needed.
And perhaps someday, so shall it be.