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Automotive Audio Testing Seminar – India Edition

October 4th, 2023, 5:00pm IST (7:30am US East Coast time)

Photo of Steve Temme performing an automotive audio test

Steve Temme performs an automotive audio test

In conjunction with our India distributor, Welan Technologies we bring you our popular automotive testing online seminar at a convenient time.

In this practical online seminar, Steve Temme will demonstrate in-car measurement of frequency response, Max SPL, and Buzz, Squeak and Rattle using a Bluetooth connection. He will discuss considerations such as physical setup, infotainment system controls and the measurement parameters. Steve and his colleagues will then discuss connectivity for automotive testing, explaining and demonstrating the various connectivity options including USB drive, Bluetooth and A2B bus. Finally, we’ll take a look at some of the other audio measurements that you can make using SoundCheck, for example active noise cancellation and voice assistance readiness. Questions will be answered during the webinar and at the end.

Smart Device Testing Seminar

Testing smart devices such as smart speakers, hearables, watches and more involves a combination of tests from many different application areas, ranging from simple transducer tests to open loop tests, Bluetooth measurements, voice activation tests, telecoms standards, hearing aid measurements and more. In this demo-focused seminar, we demonstrate how SoundCheck makes all the measurements you need throughout the entire smart device design process from component selection to pre-qualification testing.

Smart device testing demonstrations include:

  • Component tests: MEMS microphone measurement, directional microphone measurement, speaker evaluation
  • Prototype tests – open loop speaker test on a smart speaker, open loop microphone test on a smart speaker, Bluetooth hearables test, headphone Active Noise Cancellation (ANC) Measurement
  • Background Noise Tests: calibration, using pub noise to evaluate a microphone’s ability to reject background noise

Presenters: Steve Temme, Mark Latshaw, Steve Tatarunis
Duration: 48 Mins

Smart Device Measurement Resources

This seminar was originally broadcast on June 6th 2023. The recording below does not include the live Q&A at the end for attendee confidentiality reasons. However, several links to additional resources were provided during the Q&A session, and these are provided below.

  1. Internally routing audio: Open Loop microphone testing requires audio to be routed into SoundCheck. We recommend:
    1. Virtual Audio Cable for Windows: https://vac.muzychenko.net/en/index.htm
    2. Soundflower for Mac: https://github.com/mattingalls/Soundflower
  2. In response to a question about whether haptic feedback could be measured in a smartwatch, we shared a SoundCheck test sequence for measuring haptic feedback: https://www.listeninc.com/products/test-sequences/free/linear-motor-test-sequence/
  3. We touched briefly on communications audio tests when smart speakers are used as hands-free devices. To learn more about Communications Testing techniques and standards, please see our Communications Testing Seminar.
  4. Similarly, in answer to a question about testing automotive infotainment systems, we shared our Automotive audio testing seminar

More about how to Measure Smart Devices

Check out our main page on Smart Device Testing, which includes links to test sequences, relevant products and more.

 

Introducing Enhanced Loose Particles (eLP)

Watch our launch seminar for Listen’s latest algorithm, enhanced Loose Particles (eLP). This new algorithm significantly improves production line transient distortion measurement. It offers high accuracy, easy correlation to human perception, and identifies transient distortion artifacts separately from harmonic distortion for easy troubleshooting. It’s also ideal for identifying rattling buttons in audio devices, and automotive Buzz, Squeak and Rattle (BSR) measurements. This new algorithm is based on original research, and uses techniques not previously used for distortion measurement. Check out this demonstration and detailed explanation of how this algorithm works by Listen president Steve Temme.

Introducing Enhanced Loose Particles

Read on to learn more

For all things Enhanced Loose Particles including listening examples, published articles, and details of the eLP methodology, check out our Enhanced Loose Particles page.

Listen’s new enhanced Loose Particle algorithm offers accurate transient distortion measurements, even in the presence of background noise. This algorithm is highly accurate, as well as easy to configure and set limits. Results are easily correlated to audibility by listening to the loose particles in the recorded waveform.

This algorithm uses the same time envelope analysis as our pioneering (2004) Loose Particles algorithm, but rather than filtering and counting pulses, additional analysis is applied to measure the prominence, or impulsiveness, of the detected artifacts. The algorithm calculates the prominence of each loose particle event in the waveform by comparing the magnitude of a peak relative to the surrounding minimums, which reflects the impulsiveness of the artifact more accurately than the absolute magnitude of the peaks.  A user-defined prominence threshold determines the level at which the peak will be counted, and a user-defined count of events over the time window determines the pass/fail threshold.

Objective results obtained by this method are easily correlated to subjective analysis as you can listen to the recorded waveform with the fundamental removed, hearing only the loose particles. This enables the prominence threshold to easily be set based on defect audibility.

This analysis method is inherently reliable in a factory environment as external background noise events typically only occur once or twice during a measurement, whereas many loose particle transients will occur during the same timeframe. The event count is user-determined, and is set according to the background noise in the measurement environment. Prominence threshold and loose particle count are the only parameters that the user needs to define, so limit setting is simple, well correlated to audibility, and can be configured to give reliable results even when background noise is present.

智能设备测试研讨会 / Smart Device Testing Seminar

6月7日 上午10点(中国时间)  /  June 7th, 10am China time

测试智能设备,如智能音箱、可听设备、手表等,涉及许多不同应用领域的测试组合。从简单的换能器测试到开环测试,蓝牙测量,语音激活测试,电信标准测试,助听器测量等等,不胜枚举。在这个以演示为重点的研讨会上,我们将展示SoundCheck是如何在整个智能设备设计过程中进行所有你需要的测量,从组件选择到预认证测试。

演讲者: Steve Temme, Steve Tatarunis, Mark Latshaw

持续时间:1小时

 

Testing smart devices such as smart speakers, hearables, watches and more involves a combination of tests from many different application areas. Ranging from simple transducer tests to open loop tests, Bluetooth measurements, voice activation tests, telecoms standards, hearing aid measurements and more – the list is endless. In this demo-focused seminar, we demonstrate how SoundCheck makes all the measurements you need throughout the entire smart device design process from component selection to pre-qualification testing.

Presenters: Steve Temme, Mark Latshaw, Steve Tatarunis
Duration: 1 Hour

Smart Device Testing Seminar

June 6th, 9am & 2pm Eastern time; June 7th, 10am China time

Testing smart devices such as smart speakers, hearables, watches and more involves a combination of tests from many different application areas. Ranging from simple transducer tests to open loop tests, Bluetooth measurements, voice activation tests, telecoms standards, hearing aid measurements and more – the list is endless. In this demo-focused seminar, we demonstrate how SoundCheck makes all the measurements you need throughout the entire smart device design process from component selection to pre-qualification testing.

Presenters: Steve Temme, Mark Latshaw, Steve Tatarunis
Duration: 1 Hour

研讨会:新的增强型散落粒子算法 / Enhanced Loose Particle Algorithm Launch Event

2023年6月1日  上午10点(中国时间) |  June 1st 2023. 10am (China Time)

 

请参加Listen最新算法–增强型散落粒子(eLP)的发布研讨会。这种新的算法大大改善了生产线的瞬态失真测量,它提供了高精确度,易于与人类感知相关联,并将瞬态失真假象与谐波失真分开识别,便于故障排除。它也是识别音频设备中嘎嘎作响的按钮,以及汽车嗡嗡声、吱吱声和嘎嘎声(BSR)测量的理想选择。这种新的算法是基于原始研究,并使用了以前没有用于失真测量的技术。请参加这个简短的在线研讨会,由Steve Temme先生进行演示,并详细解释这个算法的工作原理。

 

Join us for a launch seminar for Listen’s latest algorithm, enhanced Loose Particles (eLP). This new algorithm significantly improves production line transient distortion measurement. It offers high accuracy, easy correlation to human perception, and identifies transient distortion artifacts separately from harmonic distortion for easy troubleshooting. It’s also ideal for identifying rattling buttons in audio devices, and automotive Buzz, Squeak and Rattle (BSR) measurements. This new algorithm is based on original research, and uses techniques not previously used for distortion measurement. Join us in this short online seminar for a demonstration by Steve Temme, and a detailed explanation of how this algorithm works.

External Control of SoundCheck Seminar

SoundCheck has led the way in production line audio measurement for over 25 years with its sophisticated suite of audio measurement algorithms that offer precise measurement, fast throughput, excellent noise immunity, and world-class reliability. However, many audio manufacturing factories are moving towards large, highly customized, integrated test configurations to evaluate products, not only for audio integrity, but often video, visual and other performance defects. This seminar explains how external control capability brings the advantages of SoundCheck into your automated test environment using any programming language compatible with TCP/IP  including C, C+, Python, LabVIEW and more.

External Control demonstrations include:

  • Enabling TCP-IP in SoundCheck, and an overview of commands
  • Using external control to open up and run a SoundCheck sequence using a python script, and returning data for use in any application
  • Changing test parameters via external control, so that test procedures can be simplified by adapting test conditions on the fly for different products
  • Loading, playing and controlling volume of  a test signal on a DUT  using a custom step in a SoundCheck sequence.
  • Using external control to automatically equalize wave files loaded into SoundCheck via TCP/IP
  • Using MATLAB with SoundCheck

Presenters: Mark Latshaw, Pranav Swaroop
Duration: 30 Mins

More about External Control of SoundCheck

The SoundCheck manual includes a full list of TCP/IP commands for use with SoundCheck, and an explanation of the JSON formatted return.

Learn more about SoundCheck for production test.

Resources for controlling SoundCheck with programs externally

To learn more about the Python programming language used in this seminar, check out the official Python website.

To learn more about MATLAB by MathWorks, check out the official MATLAB website.

External Control of SoundCheck Seminar

Oct 18th 9am & 2pm Eastern time; November 2nd, 10am China time

SoundCheck has led the way in production line audio measurement for over 25 years with its sophisticated suite of audio measurement algorithms that offer precise measurement, fast throughput, excellent noise immunity, and world-class reliability. However, many audio manufacturing factories are moving towards large, highly customized, integrated test configurations to evaluate products, not only for audio integrity, but often video, visual and other performance defects. This seminar explains how to bring the advantages of SoundCheck into your automated test environment using any programming language compatible with TCP/IP  including C, C+, Python, LabVIEW and more.

We will run through several demonstrations of SoundCheck integration including:

  • Enabling TCP-IP in SoundCheck, and an overview of commands
  • Using external control to open up and run a SoundCheck sequence using a python script, and returning data for use in any application 
  • Changing test parameters via external control, so that test procedures can be simplified by adapting test conditions on the fly for different products
  • Loading, playing and controlling volume of  a test signal on a DUT  using a custom step in a SoundCheck sequence. 
  • Using external control to automatically equalize wave files loaded into SoundCheck via TCP/IP 
  • Using MATLAB with SoundCheck.

Presenters: Mark Latshaw, Pranav Swaroop

These events are now over, but you can watch the recording here.

 

 

Automotive Audio Testing Seminar

In this practical online seminar, Steve Temme demonstrates in-car measurement of frequency response, Max SPL, and Buzz, Squeak and Rattle using a Bluetooth connection. He discusses considerations such as physical setup, infotainment system controls and the measurement parameters. We then discuss connectivity for automotive testing, explaining and demonstrating the various connectivity options including USB drive, Bluetooth and A2B bus. Finally, we take a look at some of the other audio measurements that you can make using SoundCheck, for example active noise cancellation and voice assistance readiness.

Automotive Audio testing demonstrations include:

  • Frequency Response
  • Max SPL and Max SPL Spectrum
  • Buzz, Squeak & Rattle
  • Connectivity Optios – USB, Bluetooth, A2B bus
  • ANC and Voice assistance readiness

Presenters: Steve Temme
Duration: 32 Mins

Automotive Audio Measurement Resources

This seminar was originally broadcast on July 21st 2022. The recording below does not include the live Q&A at the end for attendee confidentiality reasons. However, several links to additional resources were provided during the Q&A session, and these are provided below.

  1. Test sequence for in-car audio measurements. This sequence measures the impulsive distortion, frequency response, and maximum sound pressure level of a vehicle
  2. An article by Steve Temme on automotive Max SPL measurements. Originally published in VoiceCoil magazine, June 2022.

More about how to Measure Automotive Audio

Check out our main page on Automotive Audio Testing, which includes links to test sequences, relevant products and more.

Learn more about Connecting to Automotive Infotainment Systems

Maximum SPL measurements in cars

Buzz, Squeak and Rattle measurements

AES Technical Committee on Automotive Audio. Listen, Inc. works closely with this group to ensure that our measurement capabilities align with the measurements recommended by the AES.

Automotive Audio Testing Seminar

July 21st, 2022. 9.00am and 2.00pm Eastern US time (6.00am and 11.00am West Coast time)
July 27th, 10.00am China time

In this practical online seminar, Steve Temme will demonstrate in-car measurement of frequency response, Max SPL, and Buzz, Squeak and Rattle using a Bluetooth connection. He will discuss considerations such as physical setup, infotainment system controls and the measurement parameters. Steve and his colleagues will then discuss connectivity for automotive testing, explaining and demonstrating the various connectivity options including USB drive, Bluetooth and A2B bus. Finally, we’ll take a look at some of the other audio measurements that you can make using SoundCheck, for example active noise cancellation and voice assistance readiness. 

在这个实用的网络研讨会中,Steve Temme 将演示如何使用蓝牙连接进行车内测量,以测量频率响应、最大 SPL 以及异常音。 他将讨论物理设置、信息娱乐系统控制和测量参数等考虑因素。 然后,Steve和他的同事将讨论汽车测试的连接性,解释和演示各种连接选项,包括 USB 驱动器、蓝牙和A2B 总线。 最后,我们将看看其他您可以透过SoundCheck进行的音频测量,例如主动降噪以及voice assistance readiness测量。