La pérdida auditiva cambia el umbral auditivo.

Spanish often uses definite articles more broadly than English, especially when talking about things in a general or scientific way.

So:

• La pérdida auditiva = hearing loss in general
• El umbral auditivo = the auditory threshold / auditory threshold as a concept

In English, articles are often omitted in technical definitions or general statements. In Spanish, that is much less common here, so la and el sound natural.

Because adjectives in Spanish usually agree in gender and number with the noun they describe.

• pérdida is feminine, so the adjective is auditiva
• umbral is masculine, so the adjective is auditivo

That is why you get:

• la pérdida auditiva
• el umbral auditivo

This is standard adjective agreement.

You usually learn noun gender together with the article:

• la pérdida → feminine
• el umbral → masculine

Some clues help:

• Nouns ending in -a are often feminine, so pérdida fits that pattern.
• Nouns ending in consonants can be either masculine or feminine, so for umbral you really need to learn it as el umbral.

A good habit is to memorize new nouns with their article, not by themselves.

The accent mark shows where the stress falls: PÉR-di-da.

Without the accent, Spanish stress rules would make it sound different. The written accent tells you that the stress is on the first syllable.

It is also important because standard spelling requires it. So you should always write pérdida, not perdida, when you mean the noun loss.

Yes. Pérdida is a noun related to perder.

• perder = to lose
• pérdida = loss

So pérdida auditiva literally means something like auditory loss or hearing loss.

This noun formation is very common in Spanish: a verb and a related noun often share the same root.

Cambia is the conjugated form of the verb cambiar.

Here the subject is la pérdida auditiva, which is third person singular, so the verb must also be third person singular:

• cambiar = to change
• cambia = changes

So the structure is:

• La pérdida auditiva = subject
• cambia = verb
• el umbral auditivo = direct object

Because cambiar can take a direct object directly.

So:

• cambia el umbral auditivo = changes the auditory threshold

You do not need a preposition like a or de here.

Compare it to English:

• changes the threshold, not changes to the threshold

No, that would change the meaning.

In the original sentence:

• La pérdida auditiva = the thing doing the action
• el umbral auditivo = the thing affected by the action

So La pérdida auditiva cambia el umbral auditivo means hearing loss changes the auditory threshold.

If you say El umbral auditivo cambia la pérdida auditiva, then the auditory threshold becomes the subject, so it means the auditory threshold changes hearing loss, which is a different idea.

Spanish word order can sometimes vary, but you still need to keep the intended subject and object clear.

In Spanish, descriptive adjectives usually come after the noun, especially in technical, medical, and scientific language.

So these are the normal forms:

• pérdida auditiva
• umbral auditivo

Putting auditiva/auditivo before the noun would sound unusual here and not like normal medical Spanish.

For technical vocabulary, noun + adjective is the standard pattern.

A natural Spain Spanish pronunciation is roughly:

• au-di-TI-va

A more detailed guide:

• au sounds like the ow in cow, but shorter
• di sounds like dee
• stress falls on TI
• v in Spanish is pronounced very similarly to b, not like a strong English v

So auditiva sounds roughly like ow-dee-TEE-ba.

In Spain Spanish, cambia is roughly:

• KAM-bya

Notes:

• c before a is a hard k sound
• mb is pronounced clearly together
• ia here forms a glide, so it sounds like bya, not bee-a

So it is not cam-bee-a in careful syllable-by-syllable English terms; it is closer to KAM-bya.

Umbral literally means threshold.

In this sentence, umbral auditivo is a technical term meaning auditory threshold or hearing threshold, depending on context.

So this is not the everyday sense of threshold like the bottom of a doorway. It is a scientific/medical use: the minimum level at which sound can be detected.

Not always.

• pérdida auditiva = hearing loss
• sordera = deafness

Pérdida auditiva is often broader and can include partial or varying degrees of hearing loss. Sordera can sound stronger or more absolute, though actual usage depends on context.

In medical or technical language, pérdida auditiva is often the more precise and neutral term.

Yes, often it can.

Depending on context:

• pérdida auditiva = hearing loss
• umbral auditivo = auditory threshold or hearing threshold

In English, auditory sounds more technical, while hearing often sounds more natural. Spanish uses auditivo/a comfortably in both technical and general contexts.

It is in the present tense: cambia.

But in Spanish, just like in English, the present tense can express a general fact, not only something happening at this exact moment.

Here it sounds like a general statement or scientific fact:

• Hearing loss changes the auditory threshold

So it is not necessarily about one event happening right now. It is more likely a general truth.