Hendes mikrofon er så lav, at vi næsten ikke kan høre hende.

In Danish, lav can describe sound level as well as physical height or level.

So in Hendes mikrofon er så lav, lav means too low in volume / too quiet, not physically low.

Common examples:

• Lyden er for lav. = The sound is too low/quiet.
• Skru op, den er for lav. = Turn it up, it’s too quiet.

So this sentence is talking about the microphone’s sound level, not where the microphone is placed.

Because sin/sit/sine is only used when the owner is the same as the subject of the clause.

Here, the subject is mikrofon? No — in the clause Hendes mikrofon er så lav, the grammatical subject is mikrofon, but the possessor is hendes = her. Since the owner is not expressed as the subject with a personal noun/pronoun like hun, Danish uses hendes, not sin.

Compare:

• Hun tager sin mikrofon. = She takes her own microphone.
• Hendes mikrofon er lav. = Her microphone is quiet/low.

So hendes is correct here.

Så ... at means so ... that.

In this sentence:

• så lav = so low/so quiet
• at vi næsten ikke kan høre hende = that we can hardly hear her

It is a very common Danish structure:

• Han er så træt, at han går i seng nu. = He is so tired that he is going to bed now.
• Det er så dyrt, at jeg ikke vil købe det. = It is so expensive that I don’t want to buy it.

So the whole sentence follows a very standard Danish pattern.

Because after at, Danish uses subordinate clause word order.

In a subordinate clause, sentence adverbs like ikke usually come before the finite verb.

So:

• main clause: Vi kan næsten ikke høre hende.
• subordinate clause: ... at vi næsten ikke kan høre hende.

Breakdown:

• vi = subject
• næsten ikke = almost not / hardly
• kan = can
• høre = hear
• hende = her

This is normal Danish syntax.

Næsten ikke literally means almost not, but in natural English it usually becomes hardly or almost can’t.

So:

• vi næsten ikke kan høre hende = we can hardly hear her

It softens the statement a little compared with plain ikke.

Compare:

• Vi kan ikke høre hende. = We cannot hear her.
• Vi kan næsten ikke høre hende. = We can hardly hear her.

So næsten adds the idea that hearing her is barely possible.

Because hende is the object form of hun.

After høre = hear, Danish needs the object pronoun:

• hun = she (subject form)
• hende = her (object form)

So:

• Hun taler. = She is speaking.
• Vi kan høre hende. = We can hear her.

Using hun here would be grammatically wrong.

Because the point is that the microphone is affecting our ability to hear her voice, so Danish naturally says høre hende = hear her.

Even though the microphone is mentioned, the person speaking is still the thing being heard.

This is natural in both Danish and English:

• We can’t hear her. not usually
• We can’t hear it.

Unless you specifically mean the microphone signal or sound output itself.

Yes, but the meaning and structure would change slightly.

Your sentence uses:

• Hendes mikrofon = her microphone

If you said:

• Mikrofonen er så lav, at vi næsten ikke kan høre hende that would mean:
• The microphone is so quiet/low that we can hardly hear her

That version no longer explicitly says whose microphone it is.

So both are grammatical, but hendes mikrofon is more specific.

Danish often allows er lav to express that the sound level is low, without adding a separate verb like set or turned down.

So Hendes mikrofon er så lav is a natural compact way to say the microphone volume is low.

If you want to be more explicit, Danish could also say things like:

• Lyden på hendes mikrofon er for lav. = The sound on her microphone is too low.
• Hendes mikrofon er skruet for langt ned. = Her microphone is turned down too much.

But the original sentence is perfectly normal and idiomatic.

Yes. Lav is the natural choice for volume level.

• lav = low in volume
• stille = quiet, but often more about people, places, or general noiselessness

For example:

• Musikken er for lav. = The music is too quiet/low.
• Vær stille! = Be quiet!
• Der er stille i huset. = It is quiet in the house.

So with a microphone or sound level, lav is the better word.

Yes. It sounds natural and idiomatic.

A Danish speaker would understand it immediately as:

• her microphone volume is so low
• that we can barely hear her

If anything, in some contexts a speaker might choose a slightly more technical version like:

• Hendes mikrofon er for lav
• Lyden fra hendes mikrofon er for lav

But your original sentence is absolutely normal Danish.