Innovative System Makes Hibiya Park's Sounds and Crowds Visible to All

Visualization of Sounds and Crowds in Hibiya Park

Hylable Inc., based in Toshima, Tokyo, has announced the completion of a one-year development and testing phase for the "Hibiya Park Vibrancy Visualization System." This innovative system aims to enhance the experience of visitors, including those with hearing impairments and individuals unfamiliar with bird species, by visualizing auditory information such as the liveliness of the park and the sounds of birds. By providing this information through smartphones and display screens, the system creates a more enjoyable outdoor experience for everyone. The system will continue to be available for use until March 2026.

Explore the Hibiya Park Vibrancy Visualization System here.

Background and Objectives of the Experiment

The Tokyo Metropolitan Government initiated the "Barrier-Free Hibiya Park Project" to evolve Hibiya Park into a space that is accessible and enjoyable for all, regardless of age, gender, nationality, or disability. With the 2025 Deaflympics expected to draw numerous visitors, the initiative aims to address urban challenges in collaboration with startups. Hylable's proposal won first place at the 37th event of the "UPGRADE with TOKYO" pitch competition, which focused on creating a park that everyone can enjoy, particularly with the upcoming Deaflympics. Consequently, a practical experiment was conducted until June 2025.

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Overview of Initiatives

The project involved several key developments. The "Hibiya Park Vibrancy Visualization System" utilizes Hylable's existing indoor conversation visualization technology, "Bamiel," and adapts it for outdoor use in parks.

Development of Sound Observation Equipment

To suit Hibiya Park's environment and power supply constraints, ten waterproof measuring devices were installed at two locations within the park (the grassy square and the first flower bed), ensuring the preservation of the park's landscape.

Creation of the Visualization System

The visualization system comprises two modes: "Vibrancy Mode" and "Bird Sound Mode." In "Vibrancy Mode," a heatmap displays areas with high ambient noise, updated every two hours to show peak times compared to the previous week. "Bird Sound Mode" uses AI to identify bird calls recorded in Hibiya Park, displaying their types and locations via icons. Additionally, the system aggregates bird data over a week to highlight commonly heard species during various times of the day.

Explore the Hibiya Park Vibrancy Visualization System here.

![Vibrancy Mode Interface]
![Bird Sound Mode Interface]

AI Development for Bird Call Identification

Hylable built an AI that identifies bird calls, utilizing recorded sounds and an extensive database. Currently, the system recognizes 34 bird species, including the Japanese Tit, the Green Woodpecker, and the Kingfisher.

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Creation of a Personalized Bird Observation Calendar

Based on surveys conducted in Hibiya Park, a bird calendar was developed, containing information on easy-to-observe species and fun facts, sized for convenience. Visitors can record their bird sightings by writing names and dates or using stickers of birds drawn for the system, effectively creating a personal bird observation journal.

![Bird Calendar]
![Bird Stickers]

Events Utilizing the System

Hylable, in collaboration with the Kitamura Laboratory at Tokyo City University, hosted an event called "Discover the Vibrancy of Hibiya Park and Nature Observation." This event saw participation from 28 individuals, ranging from elementary school students to adults, with all survey respondents expressing a desire to participate again.

Event Report and Video

Future Developments

Upon concluding the demonstration project in June 2025, the system will continue to operate as the "Hibiya Park Vibrancy Visualization Service" from July 2025 until March 2026. Planned future expansions include:

- Enhancements to system functionalities and content
- Implementation of experiential events

About Hylable Inc.

Company Info: CEO Takeshi Mizumoto, Established November 21, 2016, Mission: Enrich communication through sound environment analysis. Hylable operates and provides cloud services that visualize both face-to-face and online communication. Meanwhile, it also engages in related development and research.
Location: 2-26-12 Minami-Otsuka, Toshima, Tokyo, 170-0005, Japan.
Website: Hylable Official Site

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