La cabina audiométrica reduce el ruido de fondo.

La is the feminine singular definite article, meaning the.

It is used because cabina is a feminine singular noun:

• la cabina = the booth / the cabin

In Spanish, articles must agree with the noun in gender and number:

• la cabina
• las cabinas
• el ruido
• los ruidos

So La cabina audiométrica means the audiometric booth.

Because audiométrica is an adjective describing cabina, and adjectives usually agree with the noun they describe.

Since cabina is:

• feminine
• singular

the adjective must also be:

• feminine
• singular

So:

• cabina audiométrica = feminine singular

Compare:

• el examen audiométrico = masculine singular
• la prueba audiométrica = feminine singular
• los estudios audiométricos = masculine plural
• las cabinas audiométricas = feminine plural

The accent mark shows which syllable is stressed.

audiométrica is pronounced with the stress on mé:

• au-dio-MÉ-tri-ca

Without the accent mark, Spanish pronunciation rules would suggest a different stress pattern, so the written accent is necessary.

This accent mark does not change the basic meaning by itself; it mainly tells you how to pronounce the word correctly.

Reduce is the conjugated verb, while reducir is the infinitive.

In Spanish, a complete sentence usually needs a conjugated verb:

• reducir = to reduce
• reduce = reduces / reduces

Here the subject is La cabina audiométrica, which is third-person singular, so the verb is:

• reduce

Conjugation of reducir in the present tense:

• yo reduzco
• tú reduces
• él/ella/usted reduce
• nosotros reducimos
• ustedes/ellos/ellas reducen

So La cabina audiométrica reduce... = The audiometric booth reduces...

Because Spanish usually does not need an extra helping verb like does in affirmative present-tense statements.

English:

• The booth reduces the background noise.

Spanish:

• La cabina audiométrica reduce el ruido de fondo.

The meaning of reduces is already built into reduce. Spanish verbs carry person and tense information directly, so there is no need for a separate word like does.

Yes, ruido is a masculine noun, so it takes el:

• el ruido = the noise

Many nouns ending in -o are masculine, and ruido follows that common pattern.

Plural:

• el ruido
• los ruidos

As always, it is best to learn nouns together with their article:

• el ruido
• la cabina

De fondo means background in this context.

So:

• ruido de fondo = background noise

Literally, de means of, and fondo can mean background, bottom, or depth, depending on context. But together, ruido de fondo is a very common expression for background noise.

This is an example where Spanish often uses a noun phrase instead of an adjective:

• English: background noise
• Spanish: ruido de fondo

Because in Spanish, this relationship is normally expressed with de.

Spanish often connects nouns with de where English may place one noun directly before another:

• ruido de fondo = background noise
• sala de espera = waiting room
• mesa de trabajo = work table
• centro de salud = health center

So de is the natural connector here. Saying ruido fondo would sound incorrect.

In Spanish, adjectives often come after the noun, especially when they are descriptive/classifying adjectives.

So:

• cabina audiométrica is the normal order

This kind of adjective helps identify the type of booth:

• cabina audiométrica = an audiometric booth
• prueba auditiva
• equipo médico

Some adjectives can go before the noun, but that usually happens for stylistic reasons or with certain common adjectives. Here, placing audiométrica after cabina is the standard choice.

Sometimes, but not always.

Cabina can mean things like:

• booth
• cabin
• cubicle
• enclosed compartment

In this sentence, cabina is best understood as booth, because cabina audiométrica refers to the sound-controlled booth used for hearing tests.

So although cabina looks similar to English cabin, the best translation depends on context.

Yes, grammatically you could, if the context already makes clear which booth you mean.

• La cabina reduce el ruido de fondo.

That would mean:

• The booth reduces background noise.

Adding audiométrica makes it more specific:

• La cabina audiométrica reduce el ruido de fondo.
• The audiometric booth reduces background noise.

So the adjective is not required for grammar, but it adds precision.

Yes. Reduce is the present indicative form.

In Spanish, the simple present can often translate into English in more than one way depending on context:

• reduces
• does reduce
• sometimes even a general statement like is used to reduce in broader context, though that would be a freer translation

Here the most direct meaning is:

• reduces

So the sentence states a general fact or function:

• The audiometric booth reduces background noise.

A helpful approximate pronunciation is:

la ka-BEE-na ow-dyo-MEH-tree-ka reh-DOO-se el RWEE-do deh FON-do

A few notes:

• c before a in cabina sounds like k
• au in audiométrica sounds like ow
• r in reduce is a light tapped Spanish r
• ruido begins with a Spanish r sound and ui glides together
• de fondo has a soft, short de

A more syllable-by-syllable breakdown:

• La
• ca-bi-na
• au-dio-mé-tri-ca
• re-du-ce
• el
• rui-do
• de
• fon-do

They often translate as the, but Spanish uses definite articles more often than English in some contexts.

In this sentence, both articles are natural in English too:

• La cabina = The booth
• el ruido = the noise

So the match is straightforward here.

However, more generally, Spanish may use articles where English might not, especially with general categories, body parts, or abstract ideas. But in this specific sentence, translating both as the works perfectly.