Tinnitus

Key takeaways

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

Reference excerpt

Tinnitus is a condition when a person hears a ringing sound or a different variety of sounds when no corresponding external sound is present and that other people cannot hear. The word tinnitus comes from the Latin tinnire, "to ring". Tinnitus may be associated with hearing loss or decreased comprehension of speech in noisy environments. It is common, affecting about 10–15% of people. Most tolerate it well, and it is a significant (severe) problem in only 1–2% of people. Rather than a disease, tinnitus is a symptom that may result from a variety of underlying causes and may be generated at any level of the auditory system as well as outside that system. The most common causes are hearing damage, noise-induced hearing loss, or age-related hearing loss, known as presbycusis. Other causes include ear infections, disease of the heart or blood vessels, Ménière's disease, brain tumors, acoustic neuromas (tumors on the auditory nerves of the ear), migraines, temporomandibular joint disorders, exposure to certain medications, a previous head injury, and earwax. In some people, it interferes with concentration, and can be associated with anxiety and depression. It can suddenly emerge or increase during a period of emotional stress. It may have a higher incidence in people with depression. The diagnosis of tinnitus is usually based on a person's description of the symptoms they are experiencing. Such a diagnosis is commonly supported by an audiogram, and an otolaryngological and neurological examination. How much tinnitus interferes with a person's life may be quantified with questionnaires. If certain problems are found, medical imaging, such as magnetic resonance imaging (MRI), may be performed. Other tests are suitable when tinnitus occurs with the same rhythm as the heartbeat. Rarely, the sound may be heard by someone other than the person affected by using a stethoscope, in which case it is known as "objective tinnitus". Occasionally, spontaneous otoacoustic emissions, sounds produced normally by the inner ear, may result in tinnitus. Measures to prevent tinnitus include avoiding chronic or extended exposure to loud noise, and limiting exposure to drugs and substances harmful to the ear (ototoxic). If there is an underlying cause, treating that cause may lead to improvements. Otherwise, typically, tinnitus management involves psychoeducation or counseling, such as talk therapy. Sound generators or hearing aids may help, but there are no drugs to treat the condition.

Signs and symptoms

Tinnitus is often described as ringing, but it may also sound like clicking, buzzing, hissing, or roaring. It may be soft or loud, low- or high-pitched, and may seem to come from either one or both ears, or from other parts of the head. It may be intermittent or continuous. In some individuals, its intensity may be changed by shoulder, neck, head, tongue, jaw, or eye movements.

Course Due to variations in study designs, data on the course of tinnitus shows few consistent results. Generally, prevalence increases with age in adults, and the ratings of annoyance increase with persistence at follow up.

Adverse psychological effects Although it is an annoying condition to which most people adapt, persistent tinnitus may cause anxiety and depression in some people. Tinnitus annoyance is more strongly associated with the psychological condition of the person than the loudness or frequency range of the perceived sound. Psychological problems such as depression, anxiety, sleep disturbances, and concentration difficulties are common in those with strongly annoying tinnitus. One study found that complications can also include cognitive decline and difficulty communicating, and 45% of people with tinnitus in that study had an anxiety disorder at some time in their lives. Severe cases may lead some to consider suicide; while suicidal behavior is complex, tinnitus can be a risk factor. In a cross-sectional analysis, 15.75% of the 292 patients that attended a 2019 Tinnitus and Hyperacusis Clinic in the United Kingdom "expressed that they have been bothered by suicidal and self-harm ideations within the last 2 weeks." Psychological research has focused on the tinnitus distress reaction to account for differences in tinnitus severity. The research indicates that among the cohort studied, conditioning at the initial perception of tinnitus linked it with negative emotions, such as fear and anxiety.

Types Commonly tinnitus is classified into "subjective and objective tinnitus". Tinnitus is usually subjective, meaning that the sounds the person hears are not detectable by means currently available to physicians and hearing technicians. Subjective tinnitus has also been called "tinnitus aurium", "non-auditory", or "non-vibratory" tinnitus. In rare cases, tinnitus may be heard by someone else using a stethoscope. Even more rarely, in some cases it may be measured as a spontaneous otoacoustic emission (SOAE) in the ear canal. This is classified as "objective tinnitus", also called "pseudo-tinnitus" or "vibratory" tinnitus.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Tinnitus

Start with the simplest possible case. Write down what Tinnitus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Tinnitus 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 Tinnitus 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 Tinnitus

In research: Tinnitus appears in biology 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 Tinnitus 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: Tinnitus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Audiology, Diseases of the ear and mastoid process, Occupational hazards, so understanding it makes those chapters shorter.
In everyday life: Look for Tinnitus 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.

How to study Tinnitus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tinnitus 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 Tinnitus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tinnitus in simple terms?

Tinnitus is a condition when a person hears a ringing sound or a different variety of sounds when no corresponding external sound is present and that other people cannot hear. The word tinnitus comes from the Latin tinnire, "to ring".

Why does Tinnitus matter?

Because it connects several biology 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 Tinnitus?

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 Tinnitus.