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ISEAT 2022,October 29-30 2022, Shenzhen, China.

Listen President, Steve Temme, will be presenting a paper entitled ‘Enhanced perceptual rub & buzz measurement for loudspeaker production test’.  Due to Covid-19 regulations, this paper will be presented by video.

ISEAT Web Site

 

SoundCheck Online Basic Training, October 2022

Registration is now open for our Online SoundCheck Basic Training class from October 4th-13th.

The course will again consist of 6 x 2-hour sessions over a 2 week time period, and will cover all the same content as our standard in-person basic training course. Each session is led by a live trainer and will include instruction, demos, quizzes, breakout sessions and discussion. Hands-on exercises will be provided to be completed between sessions and reviewed in subsequent classes

We are restricting attendance to 30 attendees to better facilitate breakout sessions, so sign up early to secure your spot. Registration closes on September 26th, and a 10% early booking discount will apply to all registrations received by September 15th.

Dates: October 4th, 5th, 6th, 11th, 12th 13th.

Time: 6 x 2hr sessions from 11.00am-1.00pm Eastern US Time (8.00am-10.00am Western US Time)

Attendees must attend all 6 sessions to complete the course.

Cost: $295 ($195 for support contract holders). Additional discounts for multiple people from the same company signing up together (2-3 people: 10%; 4 people: 15%; 5+ people: 25%). Additional 5% early bird discount when signing up prior to September 15th.

Instructors: Mark Latshaw and Pranav Swaroop

 

Course Outline

Session 1: Hardware & Calibration – configuring audio interfaces and external equipment; certified audio interfaces; Calibration of different DUT types (telephones, speakers, etc.)

Session 2: Memory list, Data management, Virtual Instruments (Spectrum Analyzer, RTA, Multi-meter, Signal Generator, Oscilloscope), Sequence Editor Basics

Session 3: Sequence Writing Part 1 – introduction to the sequence wizard; stimulus; acquisition; basic analysis; limits

Session 4: Sequence Writing Part 2 – Displays; Autosave; Recall; Printing

Session 5: Sequence Writing Part 3 – Messages & sequence logic; external control; sequence & step parameters

Session 6: Advanced Sequence Development – Post Processing; Statistics

 

Group discounts are available for multiple attendees from the same company:

2-3 attendees: 10% discount

4 attendees: 15% discount

5+ attendees: 25% discount

 

Early bird discount: 10% until Sept 15.

Register Now

 

We are also running Advanced Training, November 15-17th. Learn more.

SoundCheck Online Advanced Training, November 2022

Registration is now open for our Online SoundCheck Advanced Training class from November 15th-17th. Advanced training is designed for users familiar with the content of the basic class who need to make more complex measurements and want to take their SoundCheck use to the next level.

The course consists of 3 x 2-hour sessions (one per day for 3 consecutive days), and will cover three separate advanced training topics. Each session is led by a live trainer and will include instruction, demos and discussion.

Sign up early to secure your spot!  Registration closes on November 7th, and a 5% early booking discount will apply to all registrations received by Sept 16th.

Dates: November 15th, 16th, 17th.

Time: 3 x 2hr sessions from 11.00am-1.00pm Eastern US Time (8.00am-10.00am Western US Time)

Cost: $175 ($115 for support contract holders). Additional discounts for multiple people from the same company signing up together (2-3 people: 10%; 4 people: 15%; 5+ people: 25%). Additional 5% early bird discount when signing up prior to March 18th.

Instructors: Steve Temme and Mark Latshaw

 

Course Outline

November 15th: Advanced Sequence Development
This session continues where basic sequence development left off, covering topics such as advanced stimulus and analysis options, conditional branching and looping, advanced post-processing algorithms and more.

November 16th: Advanced Measurement Techniques
This session will cover two popular and rapidly growing measurement techniques, open loop testing and simulated free field measurement. Open loop testing (including Bluetooth) will discuss in detail the considerations when making open loop measurements, and examine in detail the advanced triggering options available in SoundCheck. The Splice method of obtaining simulated free field measurements was developed by Steve Temme almost 20 years ago and is currently surging in popularity due to its ability to offer reliable measurements in an office or home environment.

November 17th: Advanced Distortion Measurements
Steve Temme takes a deeper dive into the mechanics of distortion and the various distortion measurement techniques available in SoundCheck. Part educational, part SoundCheck instruction, he covers causes and analysis of THD, higher order harmonic distortion, loose particle detection and perceptual distortion methods.

 

Group discounts are available for multiple attendees from the same company:

2-3 attendees: 10% discount

4 attendees: 15% discount

5+ attendees: 25% discount

 

Early bird discount: 5% until Sept 15.

 

Register Now

We are also running Basic Training Oct 4-13th. Learn more.

Enhanced Perceptual Rub & Buzz Measurement for Testing Automotive Loudspeakers

Loudspeaker Rub & Buzz faults are a problem for automotive manufacturers as they sound harsh and immediately give the perception of poor quality. There are two places such faults can occur – during speaker manufacturing and installation of the speaker in the car. A buzzing loudspeaker in a car is disappointing to a customer and is costly to replace. It is also challenging for a service center to determine exactly where the buzzing is coming from and whether it is caused by a faulty loudspeaker or bad installation. Perceptual distortion measurements are often considered the holy grail of end-of-line testing because rejecting speakers with only audible faults increases yield. Although such measurements have been around since 2011, production line adoption has been slow because until now, sensitivity to background noise has made limit-setting challenging. In this paper, a new algorithm is introduced that uses advanced technology to reduce the impact of background noise on the measurement and offer more repeatable results. This facilitates limit setting on the production line and makes it a truly viable production line metric for increasing yield. This same metric may also be used for end-of-line automotive quality control tests. Results from various algorithms will be shown, and their correlation to subjective and other non-perceptual distortion metrics explained.

Authors: Steve Temme, Listen, Inc.
Presented at 2022 AES Automotive Conference, Dearborn, MI

Full Paper

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。

SoundCheck 20 New Features Video

In this short video, Devin Vaillancourt gives a brief overview of SoundCheck 20 new features including the new enhanced Perceptual Rub & Buzz, features for multichannel testing including the new multichannel RTA, new features for communications testing, POLQA analysis, signal generator upgrades and more.

The Future of Audio Measurements – SoundHub Denmark

Weds May 25th, 8.30-12.30

Presenters: Steve Temme, Listen Inc.; Michael Trolle, VibrAkustik

Join us at SoundHub in Struer for a great day of presentations and discussion on the latest in audio measurement. The presentations will cover a variety of audio test topics including the end of line testing for improved efficiency and yield, measurement in real-world conditions, free-field measurements without a test chamber and more. There will also be consultation time when we are happy to answer your questions or discuss any aspect of audio test. This event is highly relevant for anyone needing to test audio products, both in R&D and production.

Schedule

8.30-9.00: Check-in, coffee & Welcome by VibrAkustik & Sound Hub Denmark (Michael Trolle and Rie Kold Pripsø)

9.00-9.30: Perceptual distortion measurements

9.30-10.00: Accurate measurement of headphones and hearing assistance devices under real world conditions

10.00-10.30: Coffee and discussion time

10.30-11.00: New features in SoundCheck version 20

11.00-11.30: Free-field speaker measurements without an anechoic chamber

11.30-12.30: Consultation time: Bring us your audio devices and your measurement challenges and we’ll discuss your measurement options and demonstrate how your devices can be measured

Note: there will be live demonstrations on all topics, and a display of hardware for a complete measurement chain including fixtures, measurement microphones and sensors, audio interfaces and turntable.

 

Detailed Content Information

Perceptual Distortion Measurements: Perceptual distortion measurements enable production line yield to be increased by rejecting only devices with audible Rub & Buzz defects rather than any distortion defects, and Listen’s new enhanced Perceptual Rub & Buzz (ePRB) algorithm is the first to perform even better than the human ear! Through proprietary noise reduction technology and advanced perceptual algorithms, its performance in a noisy factory environment is comparable to the performance of a trained listener under normal listening conditions. Learn more about the science behind this algorithm, see the results, and learn how to implement it in your end-of-line tests.

Accurate Headphone Measurements in Real World Conditions: In this demo-focused session, we will demonstrate how to accurately measure Headphones and Hearing Assistance Devices under real world conditions with real world signals such as speech and music. For example, we will demonstrate, in real time, how to adjust the headphone fit for a proper seal on the head and torso simulator and measure headphone ANC with real background noise with our Multi Signal Real Time Analyzer

New Features in SoundCheck: The newly released SoundCheck 20 is at the forefront of audio measurement with new features for multichannel and communications, increasing its capabilities for audio measurement of smart speakers, infotainment systems, headphones and hearables, and other voice-activated and multichannel devices. In this 30 minute session, we will demonstrate the new features and explain how they are used for testing a variety of audio products and applications.

Free-field Speaker Measurements without an anechoic chamber: Can’t afford or get time in an anechoic chamber? That’s not a problem if you have SoundCheck! In this practical session, we will demonstrate a method first developed by Listen president Steve Temme back in 1993, known as the ‘splice’ technique. This measurement technique is easy to configure and enables you to make highly accurate free-field measurements in an ordinary room, avoiding the expense of an anechoic chamber and enabling measurements in your home or office.

Registration is not available as this event has passed.

 

Production Testing Seminar China / 产線测试网络研讨会

loudspeaker production lineMay 18th 2022. 10am (China Time) / 2022年5月18日上午10点(中国时间)

In this short seminar, Les Quindipan explores the use of SoundCheck for end-of-line production testing. He discusses typical test configurations and the type of measurements that can be made, how to set pass/fail limits and how to optimize tests for high throughput.

He will also explain how SoundCheck is easily scaled for high volume production testing, with such features as external control via another program and auto-saving data to databases, and how SoundCheck’s capabilities are easily expanded through the use of custom steps to control all types of devices and test fixtures.

This seminar will be of interest to anyone considering a production line implementation of SoundCheck, or curious as to how to transition R&D measurements to fast and effective end-of-line test.

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

在这个简短的研讨会中,Les Quindipan将 与我们探讨如何使用 SoundCheck 进行生产线末端测试。 他会讨论典型的测试配置和可以进行的测量类型、如何设置通过/失败限制以及如何优化测试以实现高吞吐量。

他还会探讨SoundCheck 如何轻松扩展以进行大批量生产测试,具有通过另一个程序进行外部控制和自动将数据保存到数据库等功能,以及如何通过使用自定义步骤轻松扩展 SoundCheck 的功能来控制所有类型的 设备和测试夹具。

任何考虑在生产线中使用 SoundCheck 的人士,或想知道如何将研发测量转换为快速有效的生产线末端测试的人士都会对此研讨会感兴趣。

本次研讨会不收取任何费用,但需要预先登记。

This event has passed. Watch the video.

 

 

 

Huge Discounts on SoundCheck 20 Upgrades

For a limited time we are offering deep discounts on a system upgrade to enable you to get up to date with the latest version of SoundCheck. The upgrade offer is a simple flat rate: $3,950 for owners of SoundCheck 14 or 15, $3,250 for owners of version 16, $2,500 for owners of versions 17 and 18, and $1,395 for owners of version 19. All the modules on your present system will be included. Promotional pricing valid till June 30th, 2022.

When you upgrade to the latest version of SoundCheck, the license is perpetual – in other words, you keep all the new features you have acquired for ever (or until you decide to upgrade to an even newer version).  Please ask us if you have any questions about upgrade licensing!

SoundCheck® 20 offers new features for multi-channel and room acoustics, as well as many usability upgrades including:

  • Enhanced Perceptual Rub & Buzz: Our new Perceptual Rub & Buzz algorithm is a reliable and repeatable method of detecting audible Rub & Buzz faults on the production line, increasing yield by rejecting only devices with audible distortion defects.
  • New Multichannel RTA functionality: The multichannel Real Time Analyzer now displays multiple channels simultaneously, and offers real time calculation and display of channel addition, subtraction, maximum, minimum and power average.
  • Updated Signal Generator: A complete overhaul of the signal generator brings additional functionality and simplified operation, particularly when using wav files.
  • POLQA: The optional POLQA (Perceptual Objective Listening Quality Analysis) module brings POLQA analysis right into SoundCheck, for perceptual measurements of speech degradation in communications applications ranging from telephones to smart devices.
  • Batch Processing of external files: External data files can now be batch-loaded and processed. This enables testing of a large number of external data files to be automated via a sequence, for example wav files of speech recordings.
  • New Features for Communications Testing: New stimulus steps and post-processing capabilities such as a silence stimulus step, and RMS level versus time and histogram post-processing steps support communications testing needs, for example, measurement of Doubletalk and other speech transmission parameters.
  • Stimulus editor upgrade: The stimulus editor can now create a stimulus from any waveform in the memory list and equalize and adjust its level, for example using active speech level. This enables such adjustments to be made to externally acquired test signals, such as those imported into SoundCheck via TCP/IP or recall steps.
  • Saving Multichannel Wav files: It is now possible to export multiple SoundCheck recorded waveforms to a single multichannel wav file.

Upgrade from Version

Upgrade List Price

Promotional Upgrade Price

Discount

14

$9,000

$3,950

56%

15

$7,500

$3,950

47%

16

$6,000

$3,250

46%

17

$4,500

$2,500

44%

18

$3,000

$2,500

16%

19

$1,500

$1,395

7%

If you are using a version prior to version 14, please contact your sales engineer for discounted price information.

PLEASE NOTE:

  • Versions of SoundCheck prior to 15 are no longer supported. We highly recommend that you take advantage of this limited time offer to upgrade your systems to the latest version. Please contact your sales engineer to discuss additional multi-system upgrade discounts.
  • If you have multiple systems with different purchase dates, we are happy to work with you to get them all upgraded to the latest version and onto the same annual support contract cycle.
  • You can also reduce your future upgrade costs by purchasing an annual support contract for an additional $950. With this, you will receive SoundCheck 21 when it is released at no extra charge, as well as priority support service.

Please note that these prices are applicable to the US only. Users outside the US should contact Listen or their local representative for pricing information.

Please email your purchase order to sales@listeninc.com. You can also contact us on this email address if you would like to pay by credit card, have any questions, or need additional paperwork to support your order.

Please also see the detailed information on new features.

request_quote

SoundCheck 20 Released: ePRB, Features for communications testing, POLQA, Multichannel enhancements and more

SoundCheck 20, Listen’s flagship audio analysis software, introduces a new state-of-the-art perceptual distortion algorithm for end-of-line testing – Enhanced Perceptual Rub & Buzz. It also includes a host of new features for multichannel and communications testing, increasing its capabilities for audio measurement of smart speakers, infotainment systems, headphones and hearables, and other voice-activated and multichannel devices.

The new enhanced Rub & Buzz algorithm is a reliable and repeatable perceptual method for detecting audible Rub & Buzz faults on the production line. This offers manufactures the option to increase yield by rejecting only those devices with audible distortion defects. Based on the sound psychoacoustic principles used in Listen’s industry-standard 2011 perceptual algorithm, new research offers refinements that improve listener correlation and new, patent-pending, noise reduction technology offers unrivaled repeatability and reliability for end-of-line use. In fact,this algorithm performs like a human ear under normal listening conditions with the background noise of a manufacturing environment! SoundCheck measures perceptual Rub & Buzz using the same stepped sine wave, simultaneously with other end-of-line measurements, enabling this valuable analysis to be added to production line tests with no extension in test time.

Two of SoundCheck’s virtual instruments, the multichannel RTA and the Signal Generator, have been significantly upgraded. The multichannel Real Time Analyzer now includes expanded functionality for real time observation of audio signals. It displays multiple channels simultaneously, and offers real time calculation and display of channel, subtraction, maximum, minimum and power average. Applications for this new feature include real-time observation of active noise cancellation, automotive industry standard 6-microphone array infotainment measurements, validating headphone seal on a test head prior to measurement by comparing left and right earphone response, and more. RTA curves are now seamlessly integrated with SoundCheck’s standard graphs and can be dragged and dropped into any graph for easy comparison to limits and reference curves. This is useful for quick comparisons to reference standards or golden units, tuning automotive infotainment systems, and more.

An overhauled signal generator brings additional functionality and simplified operation, particularly when using wav files. In addition to standard audio stimuli (sine, white noise, pink noise, etc.) with user-selected sampling rates and resolution, it can play any wav file, any memory list file, and any complex waveform created by the stimulus editor. The level can be referenced to Peak, dB or RMS. The signal can be equalized in real time, and custom EQ curves applied, which is useful when using a non-flat source such as a mouth simulator. A specific portion of a waveform can be selected to play, either by selecting a start and stop time in seconds, or by examining the waveform, and signals can play for a fixed duration, a fixed number of times, or in a continuous loop. Outputs from 2 or more signal generators can be mixed on the same channel, and waveforms from multiple signal generators can be synchronized, or delayed for phase control during playback.

The optional POLQA (Perceptual Objective Listening Quality Analysis) module brings Opticom’s POLQA 3 algorithm, implementing the ITU-T P.863 standard, right into SoundCheck, where it can be used for perceptual measurements of speech degradation in communications applications ranging from telephones to smart devices. Used just like any other analysis step in a sequence, this is a fast and cost-effective alternative to a panel of human listeners. In addition to speech degradation measurements, it may also be used to assess the impact of noise reduction algorithms, evaluate bluetooth degradation due to packet loss, or to analyze distortions introduced into the audio path.

Several new features expand the software’s post-processing capabilities for testing communications devices. These include batch processing of external files, a silence stimulus step, and RMS level versus time and histogram post-processing steps. A pre-written test sequence for categorizing Doubletalk performance to two international standards, ITU-T P.502 and ETSI TS 126 132 (part #3114), from communications expert John Bareham, is also available. Other enhancements include a stimulus editor upgrade, the ability to export multiple SoundCheck recorded waveforms to a single multichannel wav file and a hardware reset option for quickly changing audio interfaces or restoring hardware to a known configuration.