Basic Loudspeaker Measurement Seminar

Sept 30th, 2021. 9.00am and 2.00pm Eastern US time (6.00am and 11.00am West Coast time)

Join Les Quindipan and Anastassia Tolpygo on Sept 30th for a seminar on basic loudspeaker testing. This introductory seminar is aimed at anyone new to audio measurement, specifically loudspeaker testing. It will begin with an introduction to the basic design of a loudspeaker, including how a typical loudspeaker works. Various loudspeaker measurements will be explained, such as frequency response, distortion, sensitivity, phase/polarity and impedance, and how they might offer indications as to potential defects in a speaker. Typical test configurations for both R&D and end-of-line production test will be shown. A complete speaker test will be demonstrated, using SoundCheck and our free Loudspeaker complete test sequence. This will include setting up software and hardware, calibrating and configuring the test (e.g. setting pass/fail limits) and a discussion of the results. There is no charge for this seminar, but registration is required.

Note: We will be repeating this seminar in conjunction with our exclusive distributor in China, S&V Samford,  on Oct 13th. Register  for the China seminar if this timing suits you better or you prefer the slides translated into Chinese.

Register for Seminar

Advanced Microphone Measurement Seminar / 麦克风测试进阶篇网络研讨会

April 14, 2021. 9.30am (China time)

In this 120 minute online seminar, S&V Samford presents Listen’s Technical Support Manager, Steve Tatarunis, discussing some of the more advanced aspects of microphone testing including:

  • Substitution, Equalized Source and Transfer Function sequences in SoundCheck, including how to calibrate for these measurements. This is an expansion of material covered in the ‘basic microphone testing webinar’ and include more details about the sequences and calibration and the trade-offs of each method.
  • Advanced measurements including polar plot, phase, self-noise, signal to noise, distortion, active/passive noise rejection
  • Open loop microphone testing for voice activated devices such as smart speakers, automotive audio etc.
  • Advanced hardware and test configurations for measuring microphone arrays and MEMS devices

There is no charge for this seminar, but registration is required.


中国时间2021年4月14日 星期三上午9.30点

在这个120分钟的在线研讨会中,声振环保仪器有限公司以及Listen,Inc.技术支持经理Steve Tatarunis,会与大家探讨麦克风测量进阶的知识, 包括:

  • SoundCheck中的对比测试法、均衡音源和传递函数程序,包括如何校准这些测量。 这是“基础麦克风测试网络研讨会”涵盖的内容的扩展,并包括有关程序、校准以及每种方法取舍的详细信息。
  • 进阶测量,包括极坐标图、相位、底噪、信噪比、失真,主动/被动噪声抑制
  • 对语音激活设备(例如智能扬声器,汽车音频等)的开环麦克风测试
  • 语音激活设备的开环麦克风测试(例如智能扬声器,汽车音频等)。
  • 用于测量麦克风阵列和MEMS的进阶硬件和测试配置


Creating and Using Custom VIs Tutorial

This training video provides an overview of how to create and use custom VIs. Custom VIs enable you to extend the capability of your SoundCheck system by

  • Programming your own highly customized tests which run within Soundcheck,
    which is useful if your device requires additional specific tests that fall
    outside of the SoundCheck test suite
  • Enabling SoundCheck to control other hardware devices and use them in test
    sequences, for example additional application-specific interfaces.

Note that the method is slightly different in SoundCheck version 16 and later versus version 15, so please view the video that corresponds to your SoundCheck installation.

Creating and using Custom VIs (V 16+)
Creating and using Custom VIs (V 15)

Sequence Loops and Logic Tutorial

This series of 5 training videos explains how to use sequence loops and logic. Sequence loops and logic are extremely powerful features that can significantly reduce the time taken both to program and run tests. The first video walks you through the basics, then the following videos focus on 4 examples: Loop Stimulus Level, Polar Plot Measurements, Jump To Sections and Digital I/O.

Sequence Loops and Logic 1: The Basics
Sequence Loops and Logic 2: Loop Stimulus Level
Sequence Loops and Logic 3: Polar Plot Measurements
Sequence Loops and Logic 4: Jump To Sections
Sequence Loops and Logic 5: Digital I/O

Message Steps Tutorial

These 3 training videos provides guidance on how to use message steps in sequences. Message steps enable dialog between the sequence and either the operator or external devices. These fall into 3 categories, each with a short instructional video.

Part 1 – Operator Message steps
– messages between the sequence and operator, for example to advise the operator to do something, or to request the operator input a value or yes/no input.

Part 2 – External control messages
– messages that enable communication with external hardware such as DIOs and RS232 devices.

Part 3 – Listen Hardware Control messages
– messages that enable control over Listen and Portland Tool & Die hardware.

Analysis Editor Tutorials

These 5 short tutorials guide the user through the various tabs in the SoundCheck analysis editor. Note: The next tutorial will cover the remaining tabs and the available analysis algorithms.

Part 1 – Analysis Basics

Part 2 – Waveform Analyses

Part 3 – Curves

Part 4 – Time and Delay Analyses

Part 5 – Loose Particle Analysis

Stimulus Tutorials

This series of 9 short tutorials explains the various stimuli available in SoundCheck, discussing when you might use them and how to configure them in SoundCheck.

Part 1 – SoundCheck Stimulus Basics
Part 2 – Advanced functions of the Stimulus Editor
Part 3 – Frequency Stepped Sweep (Stweep)
Part 4 – Frequency Log Sweep Stimulus
Part 5 – Amplitude Log Sweep Stimulus
Part 6 – Wav file Stimulus
Part 7 – Two-tone Stimulus
Part 8 – Noise Stimulus
Part 9 – Multitone Stimulus

Calibration Tutorial

This series of 7 short tutorials guides the new user through the steps needed to calibrate SoundCheck and Listen hardware.

Part 1 – SoundCheck Calibration Basics
Part 2 – Advanced System Calibration
Part 3 – Saved Calibration Data
Part 4 – Reference Microphone Calibration
Part 5 – Amplifier Calibration
Part 6 – Speaker Equalization
Part 7 – Calibrated Device Parameters

Hardware Setup

This series of 4 short training videos guides the new user through the steps needed to set up SoundCheck and Listen hardware in 4 simple steps.

Part 1 – Listen Hardware
Part 2 – 3rd Party Hardware
Part 3 – Hardware Calibration
Part 4 – External Hardware