The Future of the Acoustic Performance Guarantee System
06/14/2026
AEB / MFAC / MSAC
From acoustic facilities where “you won’t know until you try” to acoustic facilities that “prove their performance”
Anechoic chambers, soundproof rooms, anechoic boxes, soundproof booths, and acoustic test rooms are not merely boxes or rooms.
They are important acoustic-measurement infrastructure used for product development, quality assurance, abnormal-noise inspection, sound-power measurement, research evaluation, mass-production inspection, and more.
For that reason, the proper approach is to clarify the required performance before introduction, anticipate that performance at the design stage, and confirm it through actual measurement after completion.
In the acoustic-facility industry, however, performance guarantees were for a long time not taken for granted.
- “We won’t know until we actually build it.”
- “It changes with the installation environment, so we can’t guarantee it.”
- “If the performance doesn’t come out, it’s a problem with how it’s used or with the building.”
- “Since we haven’t measured it, we can’t tell where the problem is.”
In this kind of vague state, there are cases where soundproof rooms and anechoic chambers are delivered.
As a result, even after paying a high cost, users sometimes fail to obtain the sound insulation, background-noise, or sound-absorption performance they expected, and — with both the cause and the scope of responsibility left ambiguous — are forced to simply give up and accept the loss.
The future of the acoustic performance guarantee system that Sonora aims for is to eliminate situations like these.
To make acoustic performance guarantees not a special option, but the natural responsibility of an acoustic-facility manufacturer. That is the way of thinking that future acoustic facilities require.
What happens when there is no acoustic performance guarantee
With a facility that has no acoustic performance guarantee, the locus of responsibility becomes ambiguous when a problem occurs.
For example, external noise enters the room even though a soundproof room was installed. The measured values are unstable even though an anechoic box was introduced. Unnatural peaks and dips appear in the frequency response even though an anechoic chamber was built.
In such cases, without a performance guarantee, the user is placed in situations like the following.
| Possible problem | Burden on the user |
|---|---|
| Insufficient sound insulation | May have to bear the cost of additional measures |
| High background noise | Unusable for measurement; the capital investment is wasted |
| Excessive reflected sound | The reliability of measured values drops |
| Cause unknown | Cannot isolate the room, instrument, fixture, or building |
| Ambiguous scope of responsibility | Difficult to ask the manufacturer to respond |
| Re-construction required | Cost, time, and operational downtime occur |
| No records | Difficult to explain to customers or internally |
You cannot judge the performance of an acoustic facility from its finished appearance alone. Sound insulation, background noise, sound absorption, free-field performance, and measurement reproducibility all include aspects that cannot be confirmed without actual measurement.
That is precisely why an acoustic facility without a performance guarantee poses a major risk to the user.
The Tale of Sonora Taro: what happens when you build without considering acoustic performance
As a case study that conveys this idea in an easy-to-understand way, our technical information publishes “The Tale of Sonora Taro.”
The Tale of Sonora Taro
https://anechoic-room.com/techint/the-tale-of-sonora-taro/
“The Tale of Sonora Taro” introduces a case in which a noise barrier was installed but reflection and flanking of sound were not sufficiently taken into account, so that the noise problem in another location actually grew worse. Because sound does not only travel straight but reflects, flanks around obstacles, and seeks an escape route, merely erecting a wall sometimes fails to serve as a countermeasure.
This story applies not only to noise barriers but also to soundproof rooms, anechoic chambers, and anechoic boxes.
- “A specialist company built it, so it’s probably fine.”
- “It’s an expensive facility, so the performance must be there too.”
- “It says ‘soundproof room,’ so it should be quiet.”
If a facility is introduced on the basis of such expectations alone, and the project proceeds without clarifying the guaranteed values, the measurement methods, and the scope of responsibility, then even if performance shortfalls are discovered after completion, who bears the cost of cause investigation and additional measures may remain ambiguous.
That is exactly why, for acoustic facilities, it is important to set performance targets in advance, confirm them by actual measurement after completion, and clarify the scope of the guarantee.
Why the buyer has borne the risk until now
Unlike general construction work, the post-completion performance of an acoustic facility is extremely important.
Conventionally, however, there have been cases where performance guarantees were not made clear, for reasons such as the following.
| Reason | The problem with it |
|---|---|
| Acoustic performance depends on the installation environment | That is exactly why the prior conditions and guarantee scope should be made clear |
| Measurement requires specialized knowledge | A specialist company should be able to measure and explain |
| Responsibility is split between construction work and acoustic work | The interface conditions should be organized at the design stage |
| Issuing guaranteed values becomes a risk | The risk may be being shifted onto the buyer |
| No measurement after completion | Cannot confirm whether the performance is truly achieved |
In other words, not providing a performance guarantee reduces the manufacturer’s risk while leaving a major risk with the buyer.
The buyer purchases a soundproof room or anechoic chamber precisely because acoustic performance is needed. And yet that acoustic performance is not guaranteed. This cannot be called the proper form of a specialist company.
The acoustic performance guarantee system is a concept Sonora pioneered in the industry
As a company that introduced the acoustic performance guarantee system ahead of the industry, Sonora describes itself on its own site as the “First penguin in the industry to introduce Acoustic Performance Guarantee System.”
Sonora’s product guarantee is explained as guaranteeing acoustic performance criteria — such as the sound-insulation values and the acoustic measurement values inside and outside the product agreed upon with the user or contractor — and as carrying out verification measurements of the guaranteed performance values before shipment or after delivery, providing the acoustic measurement data.
This is not merely a sales expression. It is the stance that, as an acoustic-facility manufacturer, the company takes responsibility for the performance of the products it delivers.
Furthermore, Sonora’s FAQ explicitly states, regarding projects for which a performance guarantee is treated as unnecessary, that “Projects without performance guarantees are not our business.” In other words, the approach is not to drop the performance guarantee in order to lower the price; rather, guaranteeing acoustic performance is itself treated as a premise of the business.
This way of thinking is very important. That is because an acoustic facility is not “finished once it is built”; it is finished only once it has been confirmed that the truly usable performance is being achieved.
Can a company without a performance guarantee call itself a specialist?
A company that specializes in acoustic facilities should, by rights, be able to explain the following.
- Which performance is guaranteed
- Under what conditions it is guaranteed
- By which measurement method it is confirmed
- How it will respond if the measured value falls short
- How the scope of responsibility among the building side, the HVAC side, and the equipment side is organized
- How performance is confirmed after delivery
- Whether re-measurement is possible after relocation or modification
Merely explaining “we can soundproof it,” “it will be quiet,” or “it can be used for measurement” without being able to clarify these points cannot be called sufficient for a specialist company.
Of course, not every project allows every kind of performance to be guaranteed unconditionally. The scope that can be guaranteed changes with building conditions, external noise, floor vibration, HVAC, measurement target, and operating conditions.
That is precisely why a specialist company should clarify the scope it can and cannot guarantee, organize the necessary prerequisites, and confirm them through actual measurement.
The point is not “we cannot guarantee it,” but rather designing what is guaranteed, under what conditions, and to what extent. This is the responsibility of an acoustic specialist company.
Technically too, performance confirmation by actual measurement is indispensable
The performance of an anechoic chamber or soundproof room is not determined by the performance of the sound-absorbing material or sound-insulating panels alone.
Even using the same materials, the final acoustic performance changes with construction precision, panel joints, door airtightness, the interface with the floor, HVAC routing, cable penetrations, noise from the building side, floor vibration, and reflections off measurement fixtures.
| Influencing factor | Effect on performance |
|---|---|
| Door airtightness | Affects sound insulation and indoor background noise |
| Panel joints | Becomes a cause of sound leakage, vibration transmission, and reduced insulation |
| Cable / piping penetrations | Even a small gap reduces sound insulation |
| HVAC / ventilation routes | Becomes a cause of background noise and external-noise intrusion |
| Floor vibration | Leads to low-frequency noise and measurement scatter |
| Indoor fixtures | Become a cause of reflection, diffraction, and resonance |
| Noise from the building side | Affects indoor background noise |
For example, in anechoic and hemi-anechoic chambers, it is important whether a free field, or a free field over a reflecting plane, is established. ISO 3745:2012 is an international standard that specifies a precision method for determining sound power levels by sound pressure using anechoic and hemi-anechoic chambers, and it forms a basis for evaluating product acoustic performance with high reliability.
In addition, in sound-power measurement, background-noise correction and environmental correction affect the measurement result. K₂ is an important correction value indicating how close the test environment is to a free field, and in an anechoic chamber compliant with ISO 3745, rigorous confirmation of free-field performance becomes important.
In this way, the technical meaning of the acoustic performance guarantee system is not simply to “guarantee the material specifications.” It lies in confirming by actual measurement whether the completed acoustic space is actually established as the measurement environment that is required.
What the acoustic performance guarantee system protects
What the acoustic performance guarantee system protects is not simply the performance of the soundproof room or anechoic chamber.
What it truly protects is the user’s investment, the reliability of measurement results, development decisions, quality assurance, and accountability both inside and outside the company.
| What the guarantee protects | Content |
|---|---|
| Capital investment | Reduces the risk that an expensive acoustic facility goes to waste |
| Measurement reliability | Reduces the risk that measured values are disturbed by environmental factors |
| Quality assurance | Supports the basis for product evaluation and shipment decisions |
| Development decisions | Stabilizes the evaluation of countermeasure effects and design changes |
| Internal explanation | Makes it easier to explain investment effectiveness and facility performance |
| Customer explanation | Makes it easier to demonstrate the reliability of the measurement environment |
| Long-term operation | Connects to re-confirmation after inspection, modification, and relocation |
The acoustic performance guarantee system is a system that keeps users from having to “give up and accept the loss.”
The future ahead: making acoustic performance guarantees the norm
The future of the acoustic performance guarantee system is not about making a special system even more special.
It is the opposite. The future is making acoustic performance guarantees the norm in the acoustic-facility industry.
If you build an anechoic chamber, confirm free-field performance and background noise. If you build a soundproof room, confirm sound insulation and indoor noise. If you build an anechoic box, confirm sound insulation, internal reflection, and the conditions for measurement positions. If it is for a mass-production line, confirm not only the box on its own but also conveyance, fixtures, instruments, and judgment criteria.
Rather than leaving these vague, agree on them in advance, measure after completion, and keep them as a record. This should become the standard for future acoustic facilities.
| Until now | From now on |
|---|---|
| You won’t know until you try | Set performance targets in advance |
| Responsibility for shortfalls is ambiguous | Clarify the guarantee scope and the scope of responsibility |
| No measurement | Confirm by actual measurement after completion |
| No report | Keep the measurement data |
| The buyer bears the risk | The specialist company takes responsibility for performance |
| Giving up and accepting the loss occurs | Take measures when targets are not met |
| The guarantee is an option | The guarantee is the specialist company’s basic responsibility |
The future Sonora aims for is making acoustic performance guarantees an industry standard.
The performance management that lies beyond
Once acoustic performance guarantees become the norm, what becomes important as the next stage is performance management during operation.
It does not end with confirming performance at the time of delivery. Soundproof rooms and anechoic chambers are facilities used for a long time.
Over a long period of use, things happen such as deterioration of door gaskets, renewal of HVAC equipment, addition of cable penetrations, fixture changes, expansion of surrounding equipment, changes in factory noise, relocation, and modification. Each time, it is important to re-confirm performance as needed.
| Timing | What to confirm |
|---|---|
| At delivery | Whether the guaranteed performance values are met |
| At periodic inspection | Changes in sound insulation, background noise, and HVAC noise |
| After relocation | Whether the performance is established in the new installation environment |
| After modification | The effects of changes to openings, doors, and sound-absorption specifications |
| After equipment renewal | The effects of HVAC, conveyance equipment, and fixtures |
| When a measurement anomaly occurs | Isolating the room, instrument, fixture, and external noise |
The future of the acoustic performance guarantee system evolves from “a guarantee at delivery” toward “performance management of acoustic-measurement infrastructure.”
Performance confirmation is also needed after relocation or modification
Sonora’s assembled anechoic chambers, assembled soundproof rooms, and anechoic boxes have a structure that makes relocation and modification easy to consider. This holds great value for continuing to use an acoustic facility over the long term.
When relocation or modification is carried out, however, re-confirmation of acoustic performance is necessary. This is because the following conditions may change in ways that affect performance.
| Situation | Confirmation needed |
|---|---|
| Relocation within the factory | Surrounding noise, floor vibration, sound insulation, background noise |
| Relocation to another site | Building conditions, floor structure, external noise, HVAC conditions |
| Change of room dimensions | Reflection, standing waves, measurement distance, free-field performance |
| Addition of doors / openings | Sound leakage, sound insulation, airtightness |
| Change of sound-absorbing material | Reflection characteristics, reverberation, measurement reproducibility |
| Addition of automation equipment | Drive noise, vibration, wiring/piping penetrations |
| Fixture changes | Reflection, resonance, mounting reproducibility, structure-borne sound |
Being able to relocate and modify is a major advantage for sustainable facility operation. But to maximize that value, a mechanism is needed to confirm performance after relocation and modification as well, and to adjust it as required.
The role Sonora should fulfill
Sonora has introduced the acoustic performance guarantee system ahead of the industry. Its role from here is not to keep that system as a strength belonging to Sonora alone.
- If you introduce an acoustic facility, confirming its performance is the norm.
- If performance falls short, investigating the cause and taking measures is the norm.
- Clarifying the guarantee scope and keeping the measurement data is the norm.
The role is to spread that culture across the entire industry.
A user makes a high-cost capital investment, yet fails to obtain the expected performance, and gives up and accepts the loss with both cause and responsibility left ambiguous. Eliminating cases like that — this is the true future of the acoustic performance guarantee system.
Summary
The acoustic performance guarantee system is not a mere certificate.
It is the stance that an acoustic-facility manufacturer takes responsibility for the performance of the products it delivers. And it is a mechanism that lets users carry out measurement, testing, and inspection with peace of mind.
With an acoustic facility that has no performance guarantee, the scope of responsibility becomes ambiguous when a problem occurs, and the buyer ends up bearing the risk. Despite paying a high cost, the user may fail to obtain the expected performance, leading to additional measures or to simply giving up and accepting the loss.
Sonora has introduced the acoustic performance guarantee system ahead of the industry and has demonstrated a stance of backing up its guaranteed values with verification measurements.
The future from here is to make acoustic performance guarantees not a special system, but the norm of the industry.
If you build an anechoic chamber, soundproof room, or anechoic box, design the performance, measure it, confirm it, and take measures as needed. It is only by fulfilling that responsibility, Sonora believes, that a company can be called an acoustic specialist.