Case review: acoustic test spaces for voice interaction and in-car listening
Can a voice-enabled product understand a command clearly? Does in-car audio support conversation and comfortable listening? These questions need to be examined in the environments where products are used. For a development team, an acoustic laboratory provides a place to turn everyday questions into repeatable tests.
LESSENT's acoustic laboratory project with iFLYTEK illustrates this approach to planning facilities around use cases. This retrospective draws on project information published by LESSENT in June 2026 and looks at the work supported by its different test spaces.[1]
From a quiet room to different listening environments
The project included automated variable-reverberation listening rooms for simulating acoustic conditions in everyday settings. Reverberation is the persistence of sound in a space after its source stops. Different spaces have different acoustic characteristics; a variable-reverberation room allows developers to study product behavior under different environmental conditions.
The published case also describes a listening space with a motion track for adjusting a moving sound source, supporting spatial-audio and dynamic acoustic testing. For development work concerned with sound direction and movement, testing a stationary arrangement is only one part of the intended task.
Give speech interaction and listening experience their own test tasks
The project's AI voice listening room was designed for noise-related and speech-recognition tests. Its in-car listening room addressed automotive acoustic-environment simulation and audio development. These spaces serve different purposes: one helps researchers examine voice interaction in noise, while the other provides an environment for studying and evaluating in-car audio.
The configuration illustrates how laboratory planning can begin with the product's purpose. A project team should identify what it wants to investigate before deciding which rooms and test functions it needs, rather than starting with a fixed equipment list.
Turning use cases into laboratory spaces
LESSENT designs, manufactures and implements acoustic test environments, including anechoic chambers, variable-reverberation listening rooms and multimodal acoustic laboratories.[2] Room functions, equipment layouts and the way people will use the facility need to be considered together so that the space supports subsequent development work.
A company planning a laboratory for voice-enabled products or automotive audio can begin the discussion with three kinds of information: the products to be tested, the intended use environments and the behavior its developers want to examine. Is the priority to compare voice interaction under different noise conditions, study sound direction and movement, or assess the in-car listening experience? Clear questions provide a basis for discussing room types and configurations.
Viewed through the iFLYTEK project, the connection between acoustic laboratory construction and product development lies in these specific use cases. Understanding the sound-related questions a customer needs to investigate, then translating them into suitable test spaces, is the work an integrated LESSENT solution needs to address.
Sources
[1] LESSENT, published overview of the iFLYTEK acoustic laboratory project, June 8, 2026. https://www.lessent.com/blog/12
[2] LESSENT, company and business overview. https://www.lessent.com/about
