NL-43 Class 2 Sound Level MeterNL-53Class 1 Sound Level MeterClass 1 Sound Level Meter (with low-frequency sound measurement function)The NL-53 seriesThe NL-53 features a large, easy-to-read color LCD screen with a 3.5-inch touch panel. Its intuitive, easy-to-understand user interface enhances ease of use. The inter-face supports seven languages, including Japanese, English, Ger-man, and Chinese. With an IP54 dustproof and water-resistant rat-ing (excluding the microphone), it also offers optional features like a rainproof windscreen. The NL-53 meets the latest standards and supports environmental noise measurement methods. It can si-multaneously measure up to four settings, significantly reducing work time.NL-63Development of Sound Level Meterwith a Focus on Enhancing ConnectivityIn addition to hearing aids and particle counters, sound and vibration measuring instruments are at the core of Rion’s products. ■e history of sound level meters is particularly long, dating back to 1955, when the sale of the N-1101 compact sound level meter began. In 1974, with the NA-09, Rion obtained the first type approval for ordinary sound level meters in Japan, and has remained a forerunner in the ■eld since.Rion is also well-respected overseas. Yoshikazu Hagiwara, who was posted to the Netherlands at Rion’s European rep-resentative o■ce for ■ve years starting in 2015, describes his impressions of that time.“■ey were talking about the quality of our products. It was amazing to hear such high praise everywhere I went. What especially impressed them was that our products could continue to operate reliably for extended periods without any interruptions in measurement.”Hagiwara learned that Rion’s sound level meter, developed as a handheld device, was often used for stationary monitoring at construction sites in Europe and other countries overseas. In Japan, the convenience of the handheld model was appreciated since it was used to obtain mean noise levels measured for a 10-minute period at worksites, as required by laws and regulations. In Europe, where online data monitoring systems were widely used, the common practice at the time was to install sound level meters in a ■xed position at the site to record 24 hours of sound data that ■uctuated over time.Although Rion’s existing sound level meters were capable of supporting online systems, one after another, our competitors in Europe began selling new models designed for remote monitoring. Hagiwara proposed to the head o■ce the development of a product with enhanced connectivity functions that would facili-tate the incorporation of Rion’s sound level meters into remote monitoring systems.Ryosuke Kazama of the S&V Mea-suring Instrument Development Section, who was appointed as a consultant to Hagiwara, recalls:“To meet the demand for a model that o■ered easy connectivity, we consid-ered various options like built-in Wi-Fi functions and SIM cards. As there were so many other features requested, it was really hard to choose the best set of speci-■cations that would suit everyone.”Rion’s sound level meters are used by customers in various ■elds—not just researchers, but also companies and government agencies. To sell sound level meters in Japan and abroad, Rion had to make products easy to use for everyone. ■ey held multiple discussions to enhance a specialized function for a remote monitoring instrument, while ensuring that added features designed for the convenience of certain customers wouldn’t inconvenience others. ■e new model that emerged from these efforts featured a LAN terminal port, allowing both wireless and wired connections. ■is not only improves the ease of sys-tem configuration and connection to communication devices but also enables reliable high-speed communications, which is crucial for sound measurement.Sound level meters have been one of Rion’s core businesses over the years.The NL-53 series of sound level meters emerged from this development concept.To maintain its presence in the global sound level meter market, Rion had to meet the increasing demand for functions to connect instruments to various other devices.Here, we’ll recount the story behind the development project.3of the NL-53 Series That Expanded the PossibilitiesHistory Behind the Development of Measurement
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