What causes snoring and why do some people snore louder than others? 

Snoring is the sound produced by the vibration of tissues in the upper airway during sleep. When you drift into a deep sleep, the muscles in your soft palate, tongue, and throat relax. For many people, this relaxation is significant enough that the airway partially narrows. As you breathe, the air forces its way through this narrowed space, causing the surrounding tissues to flutter and vibrate. This turbulence creates the audible sound we recognise as snoring. In the UK, snoring is extremely common, affecting approximately 40 percent of adults at some point in their lives. 

The reason some people snore louder than others is generally down to the degree of airway resistance and the physical properties of their throat tissues. A louder snore indicates a more significant obstruction or a higher velocity of airflow attempting to pass through a restricted space. While snoring is often seen as a minor nuisance, in 2026, UK clinicians increasingly view it as an important indicator of upper airway health. Understanding the underlying causes is the first step in determining whether the snoring is benign or a sign of a more serious condition like Obstructive Sleep Apnoea known as OSA. 

What we will discuss in this article 

• The physiological process of tissue vibration in the airway 

• How physical anatomy like a deviated septum or large tonsils contributes 

• The impact of weight and neck circumference on airway narrowing 

• Why alcohol and certain medications increase snoring volume 

• The role of sleeping positions in aggravating airway collapse 

• Gender and age differences in snoring prevalence 

• When loud snoring indicates the need for a clinical sleep study 

The primary causes of snoring 

Several factors can cause the airway to narrow sufficiently to produce sound. 

• Throat Anatomy: Having a low, thick soft palate or enlarged tonsils can narrow the airway. Some people also have a longer uvula, the piece of tissue hanging in the back of the throat, which can increase vibration. 

• Nasal Problems: Chronic nasal congestion or a structural issue like a deviated septum can force you to breathe through your mouth, which often triggers snoring. 

• Muscle Tone: If the muscles in the throat and tongue are too relaxed due to deep sleep, age, or exhaustion, they may collapse backward into the airway. 

• Weight Factors: Excess fatty tissue around the neck can put physical pressure on the airway when you lie down, compressing the space available for air to flow. 

Why some people snore louder 

The volume of a snore is determined by the intensity of the vibration. Several factors can increase this intensity. 

• Narrowness of the Airway: The narrower the space, the faster the air must travel to reach the lungs. Higher velocity air creates more intense vibrations, resulting in a louder sound. 

• Neck Circumference: In the UK, clinicians often measure neck circumference as a predictor of snoring volume. A larger neck often means more soft tissue pressing against the airway. 

• Alcohol Consumption: Alcohol is a potent muscle relaxant. It causes the throat muscles to relax more than usual, leading to a more complete collapse of the airway and a much louder snore. 

• Sleeping on the Back: Gravity pulls the tongue and soft tissues backward. This position typically produces the loudest snoring compared to side sleeping. 

Comparison: Factors Influencing Snoring Volume 

Factor	Effect on Airway	Impact on Volume
Alcohol	Extreme muscle relaxation	Significantly Louder
Side Sleeping	Keeps tongue forward	Usually Quieter
Nasal Congestion	Forces mouth breathing	Moderately Louder
Weight Loss	Reduces external pressure	Decreases Volume
Large Tonsils	Physical obstruction	Consistently Louder
Ageing	Loss of muscle tone	Progressively Louder

The link to Obstructive Sleep Apnoea 

It is vital to distinguish between simple snoring and Obstructive Sleep Apnoea. While most people with OSA snore loudly, not everyone who snores has the condition. 

• The Sound of OSA: Snoring in OSA is often interrupted by periods of silence when breathing actually stops, followed by a loud snort or gasp as the brain forces the airway open. 

• Daytime Symptoms: If loud snoring is accompanied by excessive daytime sleepiness, morning headaches, or irritability, it may indicate that your sleep quality is being severely compromised. 

• Clinical Assessment: In 2026, the NHS uses the Epworth Sleepiness Scale to help determine if a patient needs a referral to a sleep clinic for further testing. 

To Summarise 

Snoring is a result of physical vibrations in the throat caused by narrowed airways during sleep. The volume of the sound depends on how much the airway is restricted and how relaxed the throat muscles have become. Factors such as anatomy, weight, and lifestyle choices like alcohol consumption all play a role in making a snore louder. While many people can reduce their snoring through simple changes like side sleeping or weight management, loud and persistent snoring should not be ignored. It is an important clinical signal that warrants attention, especially if it affects your energy levels during the day or the sleep quality of those around you. 

If your snoring is exceptionally loud or involves gasping sounds, contact your GP surgery to discuss a possible referral for a sleep assessment. 

Authority Snapshot 

This article was reviewed by Dr. Stefan Petrov, a UK trained physician with an MBBS and postgraduate certifications including Basic Life Support BLS, Advanced Cardiac Life Support ACLS, and the UK Medical Licensing Assessment PLAB 1 and 2. Dr. Petrov has extensive clinical experience in general medicine, surgery, anaesthesia, ophthalmology, and emergency care. Dr. Petrov has worked in both hospital wards and intensive care units, performing diagnostic and therapeutic procedures, and has contributed to medical education by creating patient focused health content and teaching clinical skills to junior doctors within the NHS.