Audiology · Sound-tolerance testing · London
Loudness discomfort levels (LDLs), the objective test for hyperacusis and hearing-aid fitting.
Loudness discomfort level (LDL) testing measures the lowest volume at which sounds become uncomfortable across a range of frequencies. Objective assessment for hyperacusis, misophonia and used to set the maximum output (MPO) of hearing aids.
Why patients choose us
- 01
The right hands
We route you to a consultant audiologist or neuro-otologist — the person who tests you and interprets your loudness thresholds decides the plan.
- 02
Cautious in hyperacusis
A carefully staged protocol so testing informs your care without provoking a flare.
- 03
Independent, and free
We are paid by no clinic, so the recommendation is impartial and costs you nothing.
Key facts
What the LDL test is — in six lines.
The essentials before you read further — what the test measures, who runs it, what it feeds into, and where it fits alongside audiometry.
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What it measures
The lowest volume at which sound becomes uncomfortable — frequency by frequency.
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Audiology-led
A qualified audiologist performs and interprets the test, with an ENT or neuro-otology opinion if needed.
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Hyperacusis, tinnitus, misophonia
The objective anchor for sound-tolerance conditions — and the number that guides therapy.
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Sets hearing-aid MPO
Used to programme the maximum power output of hearing aids so amplified sound never becomes painful.
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Complements audiometry
Pairs with pure-tone audiometry — one shows what you hear, the other how loud is too loud.
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Cautious protocol
In tinnitus or hyperacusis, thresholds are approached carefully to avoid worsening symptoms.
Indicative pricing
What a private LDL test costs in London.
Indicative ranges across our partner audiology clinics. Send the details and we quote firm figures across two or three options.
In short
A standalone LDL test in our network: £120–£220, with a written report the same day.
| Test / package | Indicative range | Typical duration | Report turnaround |
|---|---|---|---|
| Loudness discomfort level (LDL) test | £120–£220 | 30 min | Same-day |
| LDL + pure-tone audiometry | £180–£320 | 45 min | Same-day |
| LDL + tinnitus assessment | £250–£450 | 60 min | Same-day |
| Hyperacusis work-up (LDL + audiometry + counselling) | £300–£550 | 75 min | Same visit |
| Hearing-aid MPO fitting session (with LDL) | £200–£400 | 60 min | Same visit |
| Full audiology + neuro-otology work-up | £550–£1,100 | Half-day | Same-week |
Prices vary by clinic, whether audiometry, tinnitus assessment or hearing-aid fitting is bundled, and whether a same-visit ENT opinion is included. We come back with a firm quote within one working day.
Preparation and journey
From enquiry to report — what happens, in order.
One clinician from first message to report — often within days.
Phase 1 · Before your test
Consultation and audiogram
Phase 2 · On the day
~30 minutes in the sound booth
Phase 3 · After
Report and plan
- 01
Before
Audiology or ENT consultation
A short, confidential form. Symptoms, tinnitus, sound-tolerance history, prior audiograms if you have them.
- 02
Before
Baseline pure-tone audiometry
Hearing thresholds established first — the audiogram frames how LDLs are interpreted.
- 03
Before
Careful patient briefing
The audiologist explains what discomfort means, how to signal, and that you are in control of stopping.
- 04
On the day
Frequencies tested (500–4000 Hz)
A representative spread of pitches across the speech range, tested one at a time in a sound booth.
- 05
On the day
Volume raised in 5 dB steps
Sound is presented at increasing intensity in small, controlled steps — never surprised, never sudden.
- 06
On the day
You indicate first discomfort
You signal the moment a sound becomes uncomfortably loud — that level is recorded per frequency.
- 07
After
Written report and plan
A written LDL profile with normative context, and — if indicated — desensitisation therapy, TRT, or hearing-aid MPO planning.
Typical end-to-end: 3–7 days. Urgent cases: same day.
What it shows
When an LDL test is the right test.
LDL testing answers a specific question — at what volume does sound become uncomfortable, and what does that mean for therapy or hearing-aid programming. These are the presentations we see most.
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Normal LDLs (~100 dB HL)
Discomfort thresholds in the normal range — the baseline against which everything else is measured.
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Hyperacusis (reduced LDLs)
Discomfort at unusually low volumes — the objective anchor for a hyperacusis diagnosis.
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Recruitment (rapid loudness growth)
Sounds become intolerable quickly above threshold — classically cochlear in origin.
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Tinnitus + LDL profile
Characterises the sound-tolerance profile of patients with tinnitus, guiding TRT planning.
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Misophonia patterns
Adds an objective loudness map to a predominantly emotional response to specific sounds.
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Hearing-aid MPO planning
The number that tells the audiologist where to cap amplified sound so aids stay comfortable.
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Post-injury LDL changes
Documents changes in loudness tolerance after acoustic trauma, blast injury or head injury.
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Red flag: sudden severe hyperacusis + otalgia — urgent ENT review for superior canal dehiscence
Do not wait — same-day ENT or neuro-otology assessment is warranted.
Next steps
What an LDL result opens up.
The number on the page is the beginning — the plan follows. These are the pathways most patients enter.
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Sound-desensitisation therapy
Graded, low-level sound exposure to widen the dynamic range of comfortable listening.
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Tinnitus retraining therapy (TRT)
A structured programme combining counselling with sound therapy for tinnitus and hyperacusis.
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Hearing-aid fitting with adjusted MPO
Aids programmed against your LDL profile so amplified sound never becomes uncomfortable.
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Cognitive-behavioural therapy
Evidence-based CBT for the distress and avoidance patterns that develop with sound-tolerance conditions.
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MRI IAM if asymmetric SNHL
MRI of the internal auditory meati where hearing loss between ears is unexplained.
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Neuro-otology referral
For complex, atypical or progressive presentations — an ENT specialist with a vestibular focus.
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Vestibular assessment
Formal balance testing where hyperacusis co-exists with dizziness or Tullio phenomenon.
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Structured audiology follow-up
Serial LDLs to track progress and to adjust therapy or hearing-aid programming over time.
Red flags
When hyperacusis needs urgent review.
Sound sensitivity is usually benign, but a small number of causes need same-week — sometimes same-day — ENT or neuro-otology assessment.
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Superior canal dehiscence
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Vestibular schwannoma
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Sudden severe hyperacusis
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Post-blast injury
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Ménière’s disease with hyperacusis
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Autoimmune inner-ear disease
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Migraine-associated hyperacusis
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Post-radiotherapy
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Ototoxic drug injury
Safety and eligibility
Safe when done carefully.
LDL testing is behavioural, non-invasive and radiation-free. The practical points are how the protocol is paced, and when the referral needs to be an ENT rather than an audiology one.
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You are in control
The test stops the moment you signal discomfort — you are never pushed past your threshold.
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Small, staged steps
Volume is raised in 5 dB steps so the level of each sound is predictable.
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Cautious in hyperacusis
In severe hyperacusis, we start well below expected thresholds and may abbreviate the protocol.
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Sound-booth environment
A calibrated, sound-treated room means the numbers are reliable and reproducible.
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No radiation, no needles
A purely behavioural test — headphones or inserts, and your feedback.
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Bring your audiogram
Previous hearing tests materially sharpen interpretation — bring what you have.
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Tinnitus caveat
A brief flare after testing can occur — the protocol is designed to minimise it, and it usually settles.
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A normal LDL is not a full clear
Normal loudness discomfort levels do not exclude every cause of sound-sensitivity — clinical context matters.
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Red flags trigger urgent review
Sudden severe hyperacusis with otalgia or vertigo prompts same-day ENT or neuro-otology assessment.
Reading your report
An LDL report can look intimidating. It isn’t.
Whatever the finding, the report keeps to the same four parts.
A quiet reminder
The report is written for your doctor, not for you — and that’s normal.
If you would like us to talk you through it before your follow-up, just ask.
- 01 Header
History and referral question
Your details, the reason for testing, and the sound-tolerance history that shapes interpretation.
- 02 Technique
Protocol and calibration
Frequencies tested, step size, transducer used, and the cautious protocol applied.
- 03 Findings
LDLs by frequency and dynamic range
Per-frequency thresholds, comparison with normative data, and the residual dynamic range above the audiogram.
- 04 Impression
The conclusion: read this first
Normal, mild/moderate/severe reduction in tolerance, and the concrete next step — therapy, MPO plan, or onward referral.
Recognised by major UK insurers
Cover depends on your policy and clinic; we confirm with your insurer before booking.
Frequently asked
Everything we get asked about LDL testing.
Quick answers on what the test measures, cost, referrals, hyperacusis safety, and when an ENT opinion is needed.
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What is a loudness discomfort level (LDL) test?
An audiology test that measures, frequency by frequency, the lowest volume at which sound becomes uncomfortable. It gives an objective anchor for hyperacusis, informs tinnitus retraining, and sets the maximum output limit for hearing aids.
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Is the LDL test safe if I have hyperacusis?
Yes, when performed with a cautious, staged protocol. The audiologist starts well below expected thresholds and stops the moment you signal discomfort — you remain in control throughout.
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How is an LDL test different from a hearing test?
Pure-tone audiometry measures the softest sound you can hear. LDL measures the loudest sound you can comfortably tolerate. Together they define your usable dynamic range.
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How much does a private LDL test cost in London?
A standalone LDL test in our network is typically £120–£220; combined with audiometry or tinnitus assessment the price rises accordingly. We confirm firm figures within one working day.
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Do I need a referral?
Most audiology clinics accept self-referral. We can arrange a fast-track private GP or ENT referral if one is needed for insurance or for onward pathway.
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What is a red flag that needs urgent review?
Sudden severe hyperacusis with ear pain, autophony, or vertigo suggests conditions such as superior canal dehiscence and warrants same-day ENT or neuro-otology assessment.
Sources
Guidance we rely on.
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British Society of Audiology. Recommended procedures — pure-tone audiometry and loudness discomfort levels.
British Society of Audiology. Recommended procedures — pure-tone audiometry and loudness discomfort levels. -
Bárány Society. Consensus documents on vestibular and audiovestibular disorders.
Bárány Society. Consensus documents on vestibular and audiovestibular disorders. -
British Tinnitus Association. Information on tinnitus and hyperacusis.
British Tinnitus Association. Information on tinnitus and hyperacusis. -
American Academy of Audiology. Clinical practice guidelines.
American Academy of Audiology. Clinical practice guidelines.
Last reviewed: 2026-07-30. Next review: 2027-07-30. Read time: 5 min.
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In practice, in London
How loudness discomfort levels tends to unfold when you go private
With loudness discomfort levels, the London question is usually about report turnaround and the radiologist reading it — not whether the scan is available. Waiting lists on the NHS for loudness discomfort levels vary widely by borough and by how the GP letter reads. Privately in London, we can normally offer a slot inside the same week, sometimes within 48 hours if there’s a cancellation. The difference isn’t clinical quality — the consultants are frequently the same faces you’d see on the NHS — it’s the calendar.
In practice, a private loudness discomfort levels appointment in London means a named consultant, a proper hour in the room (or the equivalent on a video call), and a report you can actually read. Most of the imaging suites and endoscopy units we use sit within a mile of Harley Street or in Chelsea and Fulham, and turnaround on findings is measured in days, not weeks. For loudness discomfort levels specifically, the difference between a routine report and a sub-speciality read is where private care earns its keep.
Where a good concierge earns its keep is in the matching. There are dozens of consultants in London who see loudness discomfort levels — but not all of them are the right fit for every case. We narrow it down based on subspecialty, insurer coverage, the specific question being asked, and whether continuity into treatment matters. The right first appointment saves you from repeating yourself later.
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