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Perception of Sound Waves01:01

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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Field Application of Global Positioning System01:28

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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Design Example01:23

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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Echo01:06

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The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
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The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Ultrasonic-Based Environmental Perception for Mobile 5G-Oriented XR Applications.

Luca Davoli1,2, Ioannis Paraskevopoulos3, Cinzia Campanella4

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Summary

This study integrates Internet of Things (IoT) sensors with eXtended Reality (XR) systems using 5G networks. This enhances XR safety and immersion by providing real-time environmental data, particularly for low-cost XR devices.

Keywords:
5GInternet of Things (IoT)Tourism 4.0eXtended Reality (XR)future-proof applicationsintegrationultrasonic sensors

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Human-Computer Interaction

Background:

  • 5G network deployment is crucial for advancing eXtended Reality (XR) applications.
  • XR systems require accurate environmental perception for user safety, especially when virtual and real environments overlap.
  • Low-cost XR equipment often lacks robust environmental sensing capabilities.

Purpose of the Study:

  • To investigate the integration of Internet of Things (IoT) sensor data with XR systems.
  • To enhance XR environmental perception and safety using ultrasonic IoT sensors.
  • To perform experimental characterization of IoT-aided XR systems for real-world applications.

Main Methods:

  • Utilized ultrasonic sensor-based IoT systems for environmental perception.
  • Developed a framework for combining XR and IoT information flows via 5G technology.
  • Conducted experimental characterization of various ultrasonic IoT system configurations worn by users.

Main Results:

  • Demonstrated the feasibility of using IoT sensors to provide crucial 'side information' to XR systems.
  • Preliminary experimental results show the potential of this integrated approach for enhancing XR.
  • Validated the concept in an illustrative 'Tourism 4.0' VR application scenario.

Conclusions:

  • The integration of IoT sensing capabilities with XR, enabled by 5G, significantly improves environmental awareness and safety.
  • This approach offers a viable solution for enhancing the performance and safety of low-cost XR devices.
  • The findings pave the way for more immersive and secure XR experiences in various sectors, including tourism.