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Headphones, Earphones, Hearables

示例

 

 

  • 微型扬声器
  • 耳机换能器
  • 模拟和数字电话
  • 手机和耳麦

应用

 

 

  • Consumer and convenience applications
  • Wireless and mobile communication devices
  • Telecommunication
  • Headsets
  • Devices with Active Noise Cancellation (ANC)
  • Hearing aids



特性

Headphones, earphones, hearables and hearing aids are designed to operate very close to the human ear having a completely different load condition compared to normal loudspeakers. Special test gear for mounting headphones and simulating the human ear is required. A reproducible and stable mounting is key for accurate testing.

Usually such devices are using wide bandwidth transducers with very light membranes and without spider. Thus, they are quite sensitive to mechanical damage and need to be tested for impulsive, irregular distortion (Rub&Buzz). Stereo balance, phase matching and sound leakage into the ambience as well as attenuation of outside noise (ANC) are important criteria for headphone performance, especially for wireless audio interfaces. Headsets also require microphone testing in addition. 

The tool chain provided by the KLIPPEL Analyzer System helps assessing, simulating, improving the performance and quality of transducers, sub-components and the final product in both the lab and at the end of the production line. This includes testing of material parameters and the formed diaphragm as well as vibration and radiation analysis of the transducer all the way to acoustical performance validation of the complete product. Unique modules like the Rocking Mode Analysis (RMA) help you finding the root causes of undesired transducer rocking caused by imbalances related to design or manufacturing. The system is complemented with microphones, laser displacement sensors, test stands, scanning robotics, ear/mouth simulators, wireless interfaces and sound sources in order to provide full-featured, turn-key test solutions for transducers, analog headphones, digital headsets, and wireless earphones and hearables.


关键议题

  • Max SPL level, hearing protection
  • Rub & Buzz, air leakage noise and other impulsive distortion
  • Stereo balance (left-right tracking)
  • Leakage into ambience
  • Damping of external noise (ANC performance)
  • True wireless interface (phase match of left and right channel)  


标准

International Electrotechnical Commission
IEC 60268-7, Sound System Equipment, Part 7: Headphones and Earphones
IEC 60318-1, Electroacoustics - Simulators of Human Head and Ear - Part 1: Ear Simulator for the Measurement of Supra-aural and Circum-aural Earphones

Institute of Electrical and Electronics Engineers
IEEE 269-2010 Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets 
IEEE 1329 Standard Method for Measuring Transmission Performance of Handsfree Telephone Sets

European Standards
BS EN 50332

International Telecommunication Union
ITU-R Recommendation BS. 775-2 Multi-channel Stereophonic Sound System with and without Accompanying Picture
ITU-T P.581 Use of Head and Torso Simulator for Hands-free and Handset Terminal Testing

International Organization for Standardization
ISO 4869-3 Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture


最相关的测量

R&D系统的模组

QC系统的模组

线性集总参数
(共振频率、品质因数、T/S参数、蠕变、电感)

线性参数测量 (LPM)
多点测量工具 (MMT)

阻抗测试任务 (IMP)
T/S参数的激光拟合 (TSX)

有效辐射面积Sd

扫描测振仪系统 (SCN)

 

扬声器非线性
(Bl(x), Kms(x), L(x) , Rms(v))

大信号识别 (LSI Tweeter)

 

单值非线性参数
(Xmax、XBl、XC、音圈偏移Xoffset、悬挂非对称性AKms)

大信号识别 (LSI Tweeter)

电机+悬挂系统检查 (MSC)

热参数
(热阻、时间常数、容量、空气对流参数)

大信号识别 (LSI Tweeter)
功率测试 (PWT)

 

不规则扬声器缺陷
(异音Rub&Buzz、松散微粒、打线、打底、空气泄漏噪声)

传递函数测量 (TRF PRO)

漏气检测 (ALD)
均衡与对齐 (EQA)
Hi-2加权谐波失真 (Hi-2)
超听力技术 (MHT)
声压测试任务 (SPL)
声压和阻抗测试任务 (SPL-IMP)
3D频谱图界限 (3DL)

定位漏气噪声
(调制噪声源的位置)

 

漏气听诊检测 (ALS)

幅值响应
(灵敏度、均值SPL、极性)

3D失真测量 (DIS)
线性仿真 (LSIM)
多音测量 (MTON)
仿真 (SIM)
仿真 - 可听化 (SIM-AUR)
传递函数测量 (TRF)

均衡与对齐 (EQA)
频谱分析 (SAN)
声压测试任务 (SPL) 
声压和阻抗测试任务 (SPL-IMP)

非线性谐波失真
(THD、分量)

3D失真测量 (DIS)
传递函数测量 (TRF)

均衡与对齐 (EQA)
Hi-2加权谐波失真 (Hi-2) 
频谱分析 (SAN)
声压测试任务 (SPL) 
声压和阻抗测试任务 (SPL-IMP)

互调失真 (IMD)

3D失真测量 (DIS)

 

调幅失真 (AMD)
(基波分量的调制)

3D失真测量 (DIS Pro)

EAR

非线性和热压缩
(基频、谐波、直流位移)

3D失真测量 (DIS)

多音测量 (MTON)

 

峰值位移
直流位移

3D失真测量 (DIS)
实时音频分析仪 (LAA)
大信号识别 (LSI)
大信号识别 (LSI3)
多音测量 (MTON)
传递函数测量 (TRF)

动态位移检查和控制 (DCX)
电机+悬挂系统检查 (MSC)
T/S参数的激光拟合 (TSX)

多音失真

线性参数测量 (LPM)
多音测量 (MTON)

 

相位响应

传递函数测量 (TRF)

均衡与对齐 (EQA) 
频谱分析 (SAN)
声压测试任务 (SPL)
声压和阻抗测试任务 (SPL-IMP)

最小相位、剩余相位、群延迟

传递函数测量 (TRF)

均衡与对齐 (EQA) 
频谱分析 (SAN) 
声压测试任务 (SPL) 
声压和阻抗测试任务 (SPL-IMP)

时频分析 (Wigner分布、累积衰减频谱、声谱图、小波等)

时频分析 (TFA)
传递函数测量 (TRF)

3D频谱图界限 (3DL)

加速寿命测试、功率测试
(耐力测试、参数变化)

实时音频分析仪 (LAA)
大信号识别 (LSI)
功率测试 (PWT)

 

音圈温度

3D失真测量 (DIS)
实时音频分析仪 (LAA)
大信号识别 (LSI)
功率测试 (PWT)

 

主要非线性产生的失真
再现音频信号中的Bl(x)、Cms(x)、Le(x)、Rms(v)

大信号识别 (LSI)
功率测试 (PWT)
仿真 - 可听化 (SIM-AUR)

 

累积加速度级 (AAL)

扫描测振仪系统 (SCN)

 

分解成径向和周向模式
(指示摇摆模式)

扫描测振仪系统 (SCN)

 

极平面辐射响应分析 (空间分辨率上的远场SPL响应)、指向性指数、声功率

近场扫描仪 (NFS)
扫描测振仪系统 (SCN)

 

模态分析 (自然频率、固有模式的形状、模态损耗因子)

高阶模态分析 (HMA)
摇摆模式分析 (RMA)
扫描测振仪系统 (SCN)

 

可听化

仿真 - 可听化 (SIM-AUR)

声压测试任务 (SPL)
声压和阻抗测试任务 (SPL-IMP)