La timpanometría revisa el tímpano.

That is a very common question. Revisar can mean to review, but it also very often means:

• to check
• to inspect
• to examine

So in this sentence, La timpanometría revisa el tímpano means that tympanometry checks/examines the eardrum.

This is a useful reminder that revisar is broader than English review.

Because revisa is a conjugated verb, while revisar is the infinitive.

Here:

• revisar = to check / to examine
• revisa = checks / examines

The subject is La timpanometría, which is third person singular, so the verb must also be third person singular:

• La timpanometría revisa... = Tympanometry checks...

Because timpanometría is a noun, and in Spanish nouns usually appear with an article more often than in English.

So:

• la timpanometría = the tympanometry / tympanometry

In English, we often leave out the article with technical or general subjects, but Spanish commonly keeps it.

Also, timpanometría is a feminine noun, so it takes la, not el.

Because tímpano is a masculine singular noun.

• el tímpano = the eardrum

Spanish usually uses articles with body parts and concrete nouns. So el tímpano is exactly what you would expect here.

A few clues help:

• Nouns ending in -ía are very often feminine:

  • la anatomía
  • la biología
  • la timpanometría

• Nouns ending in -o are very often masculine:

  • el oído
  • el tímpano

These are patterns, not absolute rules, but here they work perfectly:

• la timpanometría
• el tímpano

A simple English-friendly guide:

• timpanometría ≈ teem-pah-no-meh-TREE-ah
• tímpano ≈ TEEM-pah-no

The stressed syllables are:

• timpanomeTRÍa
• TÍMpano

In Spain, the r in timpanometría is a light tapped r, not a strong English r.

They show where the stress goes.

• timpanometría → stress on trí
• tímpano → stress on tím

Without those accent marks, a Spanish speaker would stress the words differently, so the accents are important for correct pronunciation.

In this sentence, the most natural reading is:

• La timpanometría = subject
• revisa = verb
• el tímpano = direct object

So literally:

• Tympanometry checks the eardrum

Spanish often follows the same basic order as English here:

Subject + Verb + Object

So this is a straightforward sentence.

Because the personal a is mainly used before specific people and sometimes pets or personified beings.

Here, el tímpano is a thing, not a person, so no a is used.

Correct:

• La timpanometría revisa el tímpano.

Not:

• La timpanometría revisa al tímpano.

It is most naturally understood as a general fact.

Spanish, like English, uses the present tense for general truths and descriptions of what something does:

• La timpanometría revisa el tímpano.
• Tympanometry checks the eardrum.

So it does not have to mean that someone is checking an eardrum at this exact moment.

Yes, it is grammatically correct and understandable. However, in a more technical medical context, Spanish might use a more precise verb, depending on exactly what is meant.

For example, you might also see verbs like:

• evalúa = evaluates
• examina = examines
• mide = measures

Since tympanometry specifically evaluates how the eardrum and middle ear respond, a very precise sentence might be something like:

• La timpanometría evalúa el tímpano.

But revisa is still clear and natural enough for learning purposes.

No, that sounds unnatural and incomplete in normal Spanish.

Spanish usually needs the articles here:

• La timpanometría revisa el tímpano.

Leaving them out would sound more like note-taking, headlines, or very broken Spanish.

It can do both, depending on context.

• la timpanometría can mean tympanometry as a procedure or test in general
• una timpanometría can mean a tympanometry test

Examples:

• La timpanometría es útil. = Tympanometry is useful.
• Le hicieron una timpanometría. = They did a tympanometry test on him/her.

In your sentence, la timpanometría is being used in a general sense.