Ana aude telefonul.

Because aude is the conjugated verb form used with Ana.

• a auzi = to hear (the infinitive, like the dictionary form)
• Ana aude = Ana hears

In the present tense, a auzi changes depending on the subject:

• eu aud = I hear
• tu auzi = you hear
• el/ea aude = he/she hears
• noi auzim = we hear
• voi auziți = you all hear
• ei/ele aud = they hear

So with Ana (third person singular), Romanian uses aude.

Because Ana already tells you who the subject is.

In Romanian, if you name the subject, you usually do not also need the pronoun:

• Ana aude telefonul. = Ana hears the telephone.

If you wanted, you could say Ea aude telefonul, but that would mean She hears the telephone, and it would only be used when the pronoun is actually needed for emphasis or clarity.

So Romanian often avoids extra subject pronouns when the subject is already clear.

Telefonul means the telephone or the phone.

The ending -ul is the definite article in Romanian. Unlike English, Romanian usually puts the at the end of the noun.

• telefon = telephone / a telephone
• telefonul = the telephone

This is one of the most important features of Romanian grammar.

A few more examples:

• băiat = boy

• băiatul = the boy

• carte = book
• cartea = the book

So in your sentence, telefonul is not just phone but specifically the phone.

Because pe is not normally used before an inanimate direct object like telefonul.

In Romanian, pe is often used with specific people as direct objects:

• Văd fata. = I see the girl.
• O văd pe Maria. = I see Maria.

But with things, Romanian usually does not use pe:

• Ana aude telefonul. = Ana hears the phone.

So telefonul here is a normal direct object without pe.

Yes. The normal word order is:

Subject + Verb + Object

So:

• Ana = subject
• aude = verb
• telefonul = object

This is the most straightforward and neutral order.

Romanian can sometimes change word order for emphasis, but Ana aude telefonul is the standard, natural pattern for a simple statement.

A good approximate pronunciation is OW-deh.

More carefully:

• au sounds like the ow in now
• de sounds like deh

So aude is roughly OW-deh.

Also:

• Romanian vowels are usually pronounced clearly.
• The final e is pronounced, not silent.

So do not say something like English awd. Say both syllables: au-de.

A rough pronunciation is te-le-FO-nul.

A few useful points:

• Romanian e is pronounced, not silent.
• The stress is typically on fo here: te-le-FO-nul
• The final -ul is part of the definite article and is pronounced

So say all the syllables clearly:

te-le-fo-nul

not something reduced like in fast English speech.

In this sentence, aude can usually be translated as hears.

Romanian present tense often covers what English expresses with either:

• hears
• is hearing

depending on context.

So:

• Ana aude telefonul most naturally means Ana hears the phone
• In some contexts, it could be understood more like Ana is hearing the phone

But for a simple sentence like this, hears is the best basic translation.

Not by itself in this sentence.

Ana aude telefonul literally means Ana hears the phone/telephone.

In natural English, this often suggests that the phone is ringing, but the Romanian sentence itself does not explicitly say is ringing.

If Romanian wanted to say that more directly, it would use a verb like:

• Telefonul sună. = The phone is ringing.

So your sentence means that Ana hears the phone, and the situation may imply ringing, but that idea comes from context.

Because Ana is a proper name.

Proper names usually do not take an article in a simple sentence like this:

• Ana aude telefonul.

So Ana is just the subject name, unchanged.

This is similar to English, where we say Ana hears the phone, not the Ana hears the phone.

Not literally. Telefonul means the telephone / the phone, not the call.

If you want to say the call, Romanian would use a different noun, such as:

• apelul = the call

So:

• Ana aude telefonul = Ana hears the phone
• Ana aude apelul would not be the normal way to say Ana hears the call, because a hear a call is not usually phrased that way in Romanian either.

Usually the basic meaning stays concrete: she hears the phone.

Telefon is a neuter noun in Romanian.

Romanian neuter nouns behave:

• like masculine in the singular
• like feminine in the plural

So in the singular you get:

• un telefon = a phone
• telefonul = the phone

And in the plural:

• două telefoane = two phones
• telefoanele = the phones

For this sentence, the important thing to notice is just that the singular definite form is telefonul.

Yes, but it means something slightly different.

• Ana aude telefonul. = Ana hears the phone
• Ana aude un telefon. = Ana hears a phone

So the difference is definiteness:

• telefonul = a specific phone, identifiable in context
• un telefon = some phone, not specifically identified

Both are grammatical, but they do not mean exactly the same thing.