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About Cabling Installation & Maintenance

Our mission: Bringing practical business and technical intelligence to today's structured cabling professionals

For more than 30 years, Cabling Installation & Maintenance has provided useful, practical information to professionals responsible for the specification, design, installation and management of structured cabling systems serving enterprise, data center and other environments. These professionals are challenged to stay informed of constantly evolving standards, system-design and installation approaches, product and system capabilities, technologies, as well as applications that rely on high-performance structured cabling systems. Our editors synthesize these complex issues into multiple information products. This portfolio of information products provides concrete detail that improves the efficiency of day-to-day operations, and equips cabling professionals with the perspective that enables strategic planning for networks’ optimum long-term performance.

Throughout our annual magazine, weekly email newsletters and 24/7/365 website, Cabling Installation & Maintenance digs into the essential topics our audience focuses on.

  • Design, Installation and Testing: We explain the bottom-up design of cabling systems, from case histories of actual projects to solutions for specific problems or aspects of the design process. We also look at specific installations using a case-history approach to highlight challenging problems, solutions and unique features. Additionally, we examine evolving test-and-measurement technologies and techniques designed to address the standards-governed and practical-use performance requirements of cabling systems.
  • Technology: We evaluate product innovations and technology trends as they impact a particular product class through interviews with manufacturers, installers and users, as well as contributed articles from subject-matter experts.
  • Data Center: Cabling Installation & Maintenance takes an in-depth look at design and installation workmanship issues as well as the unique technology being deployed specifically for data centers.
  • Physical Security: Focusing on the areas in which security and IT—and the infrastructure for both—interlock and overlap, we pay specific attention to Internet Protocol’s influence over the development of security applications.
  • Standards: Tracking the activities of North American and international standards-making organizations, we provide updates on specifications that are in-progress, looking forward to how they will affect cabling-system design and installation. We also produce articles explaining the practical aspects of designing and installing cabling systems in accordance with the specifications of established standards.

Cabling Installation & Maintenance is published by Endeavor Business Media, a division of EndeavorB2B.

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Knowles Unveils the Formula for Best Earphone Music Listening Experience

By: via Business Wire

New Preferred Listening Response Curve from Knowles defines the next standard in high-resolution earphones

Knowles Corporation (NYSE: KN), a market leader and global provider of advanced micro-acoustic microphones and speakers, audio solutions, and high-performance capacitors and RF products, today releases research demonstrating a new Preferred Listening Response Curve for earphone design, reflecting findings to ensure the best and most satisfying music listening experience for consumers.

Sound quality continues to be at the top of the list for consumer audio demand, yet many True Wireless Stereo (TWS) earphone manufacturers have been slow to take advantage of the developing hi-res audio ecosystem. With the proliferation of lossless music streaming subscription services like Tidal, Amazon Music HD and Apple Lossless, together with availability of high data rate Bluetooth codecs, the industry is able to deliver hi-res audio wirelessly with the right hardware and tuning. Knowles' latest research provides valuable insight into how to satisfy consumer demand for the best-sounding audio in either wired or wireless earphones.

Knowles analyzed more than 200 recordings, chosen from the last 20 years of the Billboard Hot 100 to represent much of the music that headphone wearers are likely to be streaming. This revealed significant high frequency content above 10 kHz in popular music that many earphones fail to reproduce well. From here, the team conducted controlled blind testing of a wide variety of listeners – with a range of demographics and hearing abilities – to determine what makes the best sound quality, as preferred by listeners.

Optimum high frequency response is key when designing hi-res earphones. Using technology only recently available, Knowles was able, for the first time, to extend an understanding of user preference beyond 10 kHz to create the new Knowles Preferred Listening Response Curve. By focusing on the high frequency response, the new curve is uniquely suited to give manufacturers the insight needed to deliver the best hi-res listening experience.

Key findings from the Knowles research shows that earphones tuned to earlier concepts of what sounds good severely understate the amount of high frequency energy that listeners prefer. According to the Knowles Preferred Listening Response Curve, listeners consistently preferred between 12 and 21 decibels (dB) of boost at frequencies beyond 10 kHz, depending on age and hearing ability. Designing and tuning an earphone that matches the high frequency boost identified using the Knowles Preferred Listening Response Curve is expected to consistently provide a highly satisfactory end user experience and receive high ratings from consumers.

The Knowles Curve is an especially powerful tool when used with hearing personalization algorithms. Knowles included subjects with various levels of reduced high frequency hearing response and determined their preferred amount of boost. With this data, designers of TWS earphones with hearing personalization can configure their algorithm to produce the optimum sound quality across the range of hearing abilities commonly experienced by consumers.

“Consumers want hi-res, premium sound through their TWS earphones. This has been a challenge for OEMs who have had no clear guideline for what consumers prefer across the full spectrum. Now we know exactly how to design and tune a TWS earphone to create the best sounding audio available,” said Shehab Albahri, Sr. Director of Knowles Hearing Health Technologies R&D. “Brands that design with hi-res capable hardware and tune their earphones to the Knowles Curve will unlock the true potential of lossless streaming audio.”

A Knowles Preferred Listening Response Curve whitepaper with suggestions on hardware to meet the new curve can be downloaded from www.knowles.com/preferred-listening-response. This research was first presented at AES Chicago Chapter Meeting on May 17, 2022. Knowles will also release a new TWS reference design tuned to the Knowles Curve, available in Q3 2022.

About Knowles

Knowles Corporation (NYSE: KN) is a market leader and global provider of advanced micro-acoustic microphones and speakers, audio solutions, and high-performance capacitors and RF products, serving the consumer electronics, communications, medtech, defense, electric vehicle, and industrial markets. Knowles uses its leading position in SiSonic™ MEMS (micro-electro-mechanical systems) microphones and strong capabilities in audio processing technologies to optimize audio systems and improve the user experience across consumer applications. Knowles is also a leader in hearing health acoustics, high performance capacitors and RF solutions for a diverse set of markets. Knowles’ focus on the customer, combined with unique technology, proprietary manufacturing techniques, and global operational expertise, enables it to deliver innovative solutions at scale across multiple applications. Founded in 1946 and headquartered in Itasca, Illinois, Knowles is a global organization with employees in over a dozen countries. For more information, visit knowles.com.

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