AUDIO · ACOUSTIC · PRODUCTION TEST
Turn Sound Quality into a Quantifiable Production Standard
We provide integrated testing for headphones, TWS, speakers, microphones, smart speakers, audio modules and consumer-electronics lines, covering acoustic performance, abnormal sound, electronic audio and EOL automation.
In mass production, the key question is not simply whether a product makes sound, but whether its response, distortion, sensitivity, abnormal noise and functions meet one consistent standard.
Audio Production Test / End-of-Line Test System
WHY AUDIO TEST
Production Testing Is More Than Checking for Sound
Production testing must identify defects from components, assembly, acoustic structures and circuits within a limited takt time, while directly supporting yield improvement and traceability.
Screen Out Abnormal Sound
Detect no sound, low volume, distortion, noise, vibration, air leaks, loose parts and structural noise.
Control Product Consistency
Apply consistent limits to frequency response, SPL, sensitivity, THD and microphone gain.
Increase Throughput
Shorten unit test time with automatic triggering, rapid sweeps, parallel tests and automatic decisions.
Build Quality Traceability
Link serial numbers, curves, results, stations and timestamps for process improvement and failure analysis.
PRODUCT COVERAGE
Suitable for Many Audio-Electronics Production Stages
From acoustic components to finished products, each product requires its own fixtures, coupling method, limits and takt time.
CORE SOLUTIONS
Core Audio Production-Test Solutions
The system can be split across component, PCBA, subassembly and final-product stations, or integrated as a complete EOL automated test system.
Speaker / Headphone Acoustic Test
01 · SPEAKER / HEADPHONE
Speaker and Headphone Acoustic Testing
Test frequency response, SPL, sensitivity, distortion and acoustic consistency for speakers, receivers, headphone drivers and finished products.
- Frequency Response
- SPL / Sensitivity
- THD / THD+N
- Polarity / Phase
- L/R Balance
- Impedance
02 · ABNORMAL SOUND / RUB & BUZZ
Abnormal Sound and Rub & Buzz Detection
Many production complaints are not ordinary response or THD failures, but noise, rubbing, impact, looseness, air leaks or resonance that appear only at specific frequencies, levels or structural conditions.
Rapid sweeps or dedicated excitation combined with harmonic, transient, spectral and golden-sample features automatically screen mechanical and assembly defects that conventional THD misses.
- Rub & Buzz
- Rattle / Buzz
- Loose Part
- Air Leakage Noise
- Mechanical Resonance
- Abnormal Harmonics
- Click / Pop
- Automatic Pass / Fail Decision
Voice-coil offset or rubbing, adhesive and assembly defects, loose screws or parts, enclosure leaks, diaphragm defects, grille or structural resonance, and intermittent noise in specific bands.
Rub & Buzz / Abnormal Sound Detection
Microphone / MEMS Mic Production Test
03 · MICROPHONE TEST
Microphone and Voice-Pickup Testing
Verify sensitivity, frequency response, self-noise, distortion and channel consistency for MEMS, electret, array and finished-product microphone systems.
- Mic Sensitivity
- Frequency Response
- Self Noise / SNR
- THD
- Channel Matching
- Mic Array Consistency
04 · ELECTRONIC AUDIO
Electronic Audio and Audio-Circuit Testing
Test audio amplifiers, codecs, DACs, ADCs, interfaces and modules for level, gain, distortion, noise, SNR, crosstalk and channel consistency.
Place this station before acoustic final-product testing to remove circuit defects and reduce downstream false rejects and rework.
- Level / Gain
- THD+N
- SNR / Noise
- Crosstalk
- Output Power
- Analog / Digital I/O
Electronic Audio / Acoustic Analysis
TWS / ANC / Bluetooth Audio Test
05 · TWS / ANC / BLUETOOTH
TWS, ANC and Wireless-Audio Final-Product Testing
Integrate Bluetooth pairing, left/right recognition, speaker, microphone, ANC/Transparency and final checks into one automated flow.
- Bluetooth Audio
- L/R Pairing
- ANC Performance
- Transparency Mode
- Speaker + Mic Test
- EOL Pass / Fail
PRODUCTION FLOW
Embed Audio Testing into Production Instead of Adding Complexity
The system must balance accuracy, takt time, operator convenience, fixture changes, decision logic and factory data interfaces.
01
Scan / Identify ProductRead the serial number, model and work order, then load the test program automatically.02
Automatic Connection and PositioningAutomate fixture positioning, acoustic coupling, Bluetooth and electrical connections.03
Fast Multi-Item TestingComplete response, THD, abnormal-sound, microphone and ANC tests in one flow.04
Automatic Pass / FailJudge against model limits and flag abnormal items automatically.05
Data Upload and TraceabilitySave curves, results and serial numbers and connect to MES or a database.ENGINEERING VALUE
Stable, Fast and Consistent Testing Is the Real Production Challenge
A result that works in the lab may not be stable on the line. Fixtures, ambient noise, coupling, golden samples and limits all affect yield.
Common Production-Test Problems
It may come from microphone position, acoustic coupling, fixture sealing or environmental noise differences。
Traditional THD may not reliably capture transient sounds, narrow-band resonance or mechanical looseness; dedicated abnormal-sound algorithms and decision rules are required。
Optimize test order, rapid sweeps, parallel measurements and automatic switching。
Our Solution Focuses On
PROJECT CASE
From Manual Listening to Standardized Automated Testing
Demonstrate with real production logic how the test system reduces subjective variation and establishes traceable quality data。
TWS Earbuds End-of-Line Test Example
CASE EXAMPLE · TWS EOL
TWS Earbud EOL Automated Test System
The existing line relied on manual listening for abnormal sounds and separate stations for Speaker, Mic and ANC checks. The test cycle was long and operator judgments varied significantly。
The solution integrates automatic Bluetooth connection, Speaker frequency response and THD, Rub & Buzz detection, microphone sensitivity and ANC functions in one station, with barcode-based program selection。
After testing, Pass / Fail is generated automatically and key curves and defects are saved for yield analysis, repair localization and supplier quality management。
CONTACT US
Tell Us Your Product and Takt Time; We Will Design the Test Station
Share the product type, test items, current method, target takt, station count and traceability needs so we can plan a preliminary solution.
Contact Us Directly
You can also email product specifications, limits, golden-sample data or production-line documents.
- CompanyYour company name
- Phone+135-1060-4275
- Emailsales@puseng.cn