science

Obstruent

Obstruent is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Obstruent rather than just read about it. In short: In phonetics, an obstruent (, OB-stroo-ənt) is a speech sound that is formed by obstructing airflow, such as [d] (plosives/oral stops), [ʒ] (fricatives), or [d͡ʒ] (affricates). Obstruents contrast with sonorants, which have no such obstruction and therefore "resonate".

Key takeaways

Obstruent belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Obstruent to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Obstruent from memory before moving on to harder problems.

Reference excerpt

In phonetics, an obstruent (, OB-stroo-ənt) is a speech sound that is formed by obstructing airflow, such as [d] (plosives/oral stops), [ʒ] (fricatives), or [d͡ʒ] (affricates). Obstruents contrast with sonorants, which have no such obstruction and therefore "resonate". All obstruents are consonants, but sonorants include vowels as well as consonants. Compare occlusives, a class of speech sounds which includes both oral and nasal stops as well as affricates, but excludes fricatives, and contrasts with continuants.

Subclasses Obstruents are subdivided into:

plosives (oral stops), such as [p, b], with complete occlusion of the vocal tract, often followed by a release burst; fricatives, such as [s, z], with limited closure, not stopping airflow but making it turbulent; affricates, which begin with complete occlusion but then release into a fricative-like release, such as [t͡s] and [d͡z].

Voicing Obstruents are often prototypically voiceless, but voiced obstruents are common. This contrasts with sonorants, which are prototypically voiced and only rarely phonemically voiceless.

Worked examples

Example 1 — a first encounter with Obstruent

Start with the simplest possible case. Write down what Obstruent claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Obstruent before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Obstruent ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Obstruent

In research: Obstruent appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Obstruent in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Obstruent is common in secondary-school and first-year university syllabi. It links to neighbouring topics Obstruents, Phonetics stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Obstruent outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Obstruent in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Obstruent means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Obstruent out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Obstruent in simple terms?

Why does Obstruent matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Obstruent?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Obstruent.