News & Events
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Steve Temme will be presenting a paper at AES Europe with Viktor Dobos of Harman entitled “Evaluation and recommendation of different audio test methods and measurements for end-of-the-line automotive speaker quality control”. In this paper they will discuss the loudspeaker characteristics that can be measured, and common measurement challenges and how to overcome them and how to avoid them, both on a loudspeaker production line as well as during installation into an automotive vehicle. Several different audio test methods and measurements for end-of-the-line automotive speaker quality control will be evaluated, and the most relevant ones identified. Speed, statistics, and full traceability are also discussed.
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
We are excited to introduce our new admin team – Barbara Keane (Office Manager) and Brianna Everette (Administrative Assistant). Barbara and Brianna will be the first point of contact many customers have with our office. They are responsible for processing orders and supporting the sales team, as well as ensuring that phones are answered, visitors are greeted, and the office runs smoothly. Barbara has an extensive background in project management, and Brianna has diverse administrative and office experience. Please join us in welcoming them on board. Barbara is on the left in the photo, and Brianna on the right.
We are holding a 3 day training event on April 24-26 in Santa Clara, CA. This event will feature a 1-day course on electroacoustics testing, presented by Chris Struck of CJS Labs, followed by a 2 day SoundCheck training class.
In the Electroacoustics class, you will learn about the theory behind your audio measurements. The content will cover sound level measurement, psychoacoustics, electroacoustics, soundfields in real rooms, frequency responses, test signals and more. It is ideal for those new to the industry or anyone wishing to gain a better understanding of the measurement principles behind their acoustic tests.
This hands-on class covers all the major features of SoundCheck version 15, including writing sequences, test signals, analysis, distortion measurements and more. The class is a combination of presentations interspersed with hands-on exercises to ensure that you are comfortable with all the concepts and methods taught before you leave the classroom. Although no previous SoundCheck experience is assumed, the course still offers plenty to users familiar with writing basic sequences. Although the SoundCheck training is intended as a 2-day program, it is possible to attend just one day of the training.
Location / Dates / Time
The Embassy Suites, 2885 Lakeside Drive, Santa Clara, CA 95054.
April 24-26, 2017. Course registration starts at 8:00 AM and the training course is 8:30 AM to 5:00 PM each day.
Learn about the latest in headphone test systems and methods from design to EOL Test. Industry experts Steve Temme (Listen, Inc.) and Peter Wulf-Andersen (G.R.A.S.), as well as guest speaker Chris Struck will discuss test equipment (ear couplers, test fixtures, test software and hardware) and demonstrate practical test setups for both R&D and QC headphone testing. It will cover in-ear monitors, Bluetooth, lightning/USB, noise-cancelling and high resolution headphones, in addition to conventional analog headphones. You can even measure your own headphone using our equipment in the hands-on session. Please see the full agenda below.
There is no charge for this one-day seminar and lunch will be provided. Space is limited, so please RSVP today.
Locations and Dates:
Seattle: Monday Feb 27th, Embassy Suites Bellevue
Silicon Valley: Wednesday March 1st, Embassy Suites Santa Clara
Los Angeles: Friday March 3rd, Embassy Suites Glendale
Agenda (9am-4pm) – UPDATED
- Overview of Headphone Test Systems and tools
- Traditional tools vs. modern consumer demands
- Introduction to head and ear related terminology and definitions.
- Historical perspective and background for the tools and standards used today.
- Limitations vs. Possibilities in term of the measurement capabilities. How does that relate to the modern challenges with Bluetooth and ANC related testing tasks?
- Tools for Next Generation Headphone Testing
- Solutions to some the challenges addressed above.
- Examples based on products and measurements.
- What about frequencies above 20kHz? Science or marketing? Measurement Consistency – Development vs. Production
- Progress in measurements from Head and Torso Simulator (KEMAR) to Production Test Fixture (45CC – flat plate). How the different components affect the measurements:
- Software and hardware for headphone testing including typical headphone measurements and test setups
- Traditional tools vs. modern consumer demands
- Practical examples of headphone measurements on.
- Analog Headphones
- Bluetooth Headsets
- ANC Headphones
- Lightning/USB Connected Headphones (using triggered recordings)
- Hi-Res Headphones
- In-ear monitors
- Measurements including:
- Frequency Response relative to a target response
- Left/Right tracking
- Noise attenuation
- Distortion including Non-Coherent Distortion
- Standards including Max SPL EN-50332 & IEC-60268-7
- Headphone Design (Guest Speaker Chris Struck, CJS Labs)
- Desired headphone response
- Headphone measurement standards
- Hands-on testing: Bring your own device and test it using one of our measurement setups
A new 4 page brochure outlines Listen’s capabilities in loudspeaker and microspeaker testing. SoundCheck offers simple, fast and accurate testing of any loudspeaker – no matter what the form factor, functionality, connector or additional features. It measures a full range of driver parameters via traditional analog or digital, wireless/Bluetooth, Toslink, HDMI or USB connections, as well as microphone performance, surround sound and more.
Measurements that SoundCheck can make include:
- Frequency response
- Phase & polarity
- Distortion: harmonic, IM, multitone & non-coherent
- Rub & Buzz (inc. Perceptual Rub & Buzz)
- Directivity (including polar plots)
- Max SPL
- Power rating tests
- Simulated free field measurements
- Thiele-Small parameters
- Time-frequency analysis
A new 4 page brochure outlines Listen’s capabilities in automotive audio testing. SoundCheck offers simple, fast and accurate testing of vehicle audio quality, from individual speaker components to complete in-vehicle infotainment and telematics systems. With interfaces to connect via Bluetooth, Lightning, USB and with individual MEMs devices, as well as analog connections, SoundCheck can handle the complexity and demands of testing in today’s vehicles. The measurements that SoundCheck can make include:
- Speaker/system response
- Speaker/panel buzz, squeak and rattle
- Bluetooth audio performance
- Head unit and amplifier response & THD+N
- Microphone/microphone array response
- Active noise cancellation effectiveness
- Spatial reproduction accuracy