Communications Testing Seminar

Dec 14th, 9am & 2pm Eastern time; Dec 15th, 10am China time

Communications tests are not just for telephones! Join us for a demo-packed seminar with communications industry expert, John Bareham as we show how to evaluate devices such as smart speakers, headphones and wearables as well as all types of phones using industry standard procedures. We’ll talk about equipment, standards, and demonstrate sections of the TIA920B and TIA5050 standards, as well as Doubletalk measurements and POLQA analysis, all within SoundCheck.

Presenters: Steve Temme, John Bareham, Les Quindipan

 

通信测试研讨会 / Communications Testing Seminar

中国时间12月15日上午10点 / Dec 15th, 10am China time

通信测试不仅适用于电话! 与我们一起参加由通信行业专家 John Bareham 主持的演示研讨会吧,我们将展示如何使用行业标准程序评估智能扬声器、耳机、可穿戴设备以及所有类型的电话等设备。 我们将讨论设备、标准,并演示 TIA920B 和 TIA5050 标准的部分,以及 Doubletalk 测量和 POLQA 分析,所有这些都能在 SoundCheck 中找到。

主持人:Steve Temme、John Bareham、Les Quindipan

Communications tests are not just for telephones! Join us for a demo-packed seminar with communications industry expert, John Bareham as we show how to evaluate devices such as smart speakers, headphones and wearables as well as all types of phones using industry standard procedures. We’ll talk about equipment, standards, and demonstrate sections of the TIA920B and TIA5050 standards, as well as Doubletalk measurements and POLQA analysis, all within SoundCheck.

Presenters: Steve Temme, John Bareham, Les Quindipan

 

External Control of SoundCheck Seminar / 通过外部控件使用SoundCheck

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.

SoundCheck 凭借其精密的音频测量算法套件,在生产线音频测量领域处于领先地位超过 25 年,这些算法可提供精确的测量、快速的吞吐量、出色的抗噪性和世界级的可靠性。然而,许多音频制造工厂正在转向大型、高度定制、集成的测试配置来评估产品,不仅针对音频完整性,还经常针对视频、视觉和其他性能缺陷。该研讨会探讨如何使用任何与 TCP/IP 兼容的编程语言(包括 C、C+、Python、LabVIEW 等)将 SoundCheck 的优势带入您的自动化测试环境。

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.

我们将运行几个 SoundCheck 集成演示,包括:

  • 在 SoundCheck 中启用 TCP-IP,以及命令概述
  • 使用外部控件打开并使用 python 脚本运行 SoundCheck 程序,并返回数据以用于任何应用程序
  • 通过外部控制更改测试参数,以便通过针对不同产品即时调整测试条件来简化测试程序
  • 使用 SoundCheck 程序中的自定义步骤加载、播放和控制 DUT 上的测试信号的音量。
  • 使用外部控制自动均衡通过 TCP/IP 加载到 SoundCheck 中的波形文件
  • 将 MATLAB 与 SoundCheck 结合使用。

Presenters: Mark Latshaw, Pranav Swaroop

 演讲者:Mark Latshaw、Pranav Swaroop

Microphone Frequency Response and Sensitivity Test Sequence

This is sequence is a basic example of the two most common microphone measurements: frequency response and sensitivity. A stepped sine sweep is played from 10 kHz to 100 Hz through a source that has previously been calibrated to produce 1 Pascal across the frequency band. The recorded signal is analyzed with a Heterodyne analysis step, which calculates the response curve. A post processing step is then used to extract the level at 1 kHz, the sensitivity value. Limits are set around both the frequency response and the sensitivity, but the default values are arbitrary and should be adapted to your particular device.

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Hearing Aid Input vs Output Test Sequence

This sequence follows the ANSI S3.22-1996 standard method for testing hearing aids with AGC (automatic gain control). The test uses an amplitude sweep from 50 90 dBSPL played through the anechoic test box speaker. This sweep is repeated at four frequencies (1 kHz – 4 kHz) in 1 kHz increments. The output of the hearing aid is plotted vs. the input on the graph.

For more information, see section 6.15 of the standard.

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Bluetooth Headset Test Sequence

The purpose of this sequence is to test a Bluetooth headset using a mixture of analog and digital channels. First, a Multitone stimulus is created with SoundCheck, played back over the Bluetooth headset (at 8 kHz) and recorded by a head and torso simulator’s ear (at 44.1 kHz). Then the same Multitone stimulus is played back through the head and torso’s mouth simulator (at 44.1 kHz) and recorded via the Bluetooth headset (at 8 kHz).

Due to inaccuracies of clock frequency, the Bluetooth device playback sampling rate is often slightly different than it is specified. Therefore, in SoundCheck, the Recorded Time Waveforms are frequency shifted to correct for the inaccurate sampling rate. The exact device playback sampling rate is displayed.

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Polar Plot (Linear X Turntable) Loudspeaker Sequence

This sequence measures the polar response of a loudspeaker in both the vertical and horizontal dimensions. It is designed to work with the Linear X turntable, and has all the necessary commands to automatically rotate it via RS-232. The sequence uses a log sweep stimulus with the Time Selective Response algorithm so that the measurements can be run in a non-anechoic environment. Note that the time window needs to be adapted to the user’s measurement space. The sequence plays the stimulus and measures at 10 degree increments from 0 to 180 degrees. This process is repeated with the speaker positioned horizontally. The two results are mirrored to display full 360 degree polar plots for each axis. A directivity index curve is also calculated for each axis and is displayed at the end of the test.

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Time Selective Response Sequence

This sequence demonstrates the capabilities of the TSR (Time Selective Response) algorithm in SoundCheck. Using TSR with a log sweep is a very fast and effective method for measuring frequency response and THD of a speaker in a non-anechoic environment. This example plays a quick log sweep from 20 Hz to 20 kHz. An analysis step then uses the TSR algorithm with time windowing to output frequency response, harmonics, THD, and impulse response curves.

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2021 End of Year Promos

We have some amazing discounts to celebrate the end of 2021 and help you get more for your money.

Each of these will be launched on the scheduled dates; we are happy to provide quotes for these items ahead of the scheduled date, to enable efficient order processing. All offers expire at 5pm on December 31st. Please contact your sales engineer or email sales@listeninc.com with any questions.

 

DateOffer
Nov 29th26% off version upgrades (support contract purchase required)
Dec 6th26% off all additional modules
Dec 13thFree software upgrade from 2 to 8 channels when you buy an AmpConnect 621 ($1500 value)
Dec 20th26% off package upgrades (basic to advanced; advanced to complete etc)
Dec 27th26% off new Stereo Soundfield Parameters sequence

Note: offers cannot be combined with other discounts (e.g. quantity discounts).