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🇺🇸 VIRGINIA TECH UNVEILS BREAKTHROUGH CHIP THAT LETS SOUND MOVE MATTER Scientists at Virginia Tech have created something straight out of science fiction... a chip that uses sound waves to move and shape objects as if they had invisible hands. The new acoustic metamaterial chip can bend, twist, and...

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In the Sanskrit tradition, this primal sound is called "Anahata Nada," the "Unstruck Sound." Literally, this means "the sound that is not made by two things striking together." Thus, sound that is not made of two things striking together is a sound with no physical qualities, the "sound" of energy, the sound of the universe itself. Joseph Campbell likens this unstruck vibration to the humming of an electrical transformer, or the—to our ears—unheard hummings of atoms and molecules. Ancient Vedic traditions teach that the audible sound which most resembles and evokes in us the unstruck sound is the vocal syllable OM. This ancient mantra is composed of four elements: a sequence of three vowels: A, U, and M, and the silence which begins and ends the sequence, the silence which surrounds it. It might be said that the ultimate aim of Yoga is to enter this third dreamless realm while awake. Yoga means "yoke" or "join." Through yoga we "join" our waking consciousness to its "source" in the world of pure, qualitiless unconsciousness Studies have shown that Om chanting can induce changes in brain wave activity, particularly in the alpha and theta frequency bands. Alpha waves are associated with relaxation and meditation, while theta waves are associated with deep relaxation and sleep. In Hindu texts (Mandukya Upanishads), AUM is regarded as the sound of the universe, from which everything originated. It represents the sound of Pranava and the vibration of the four states of the Supreme Being. BENEFITS Chanting "Aum" can reduce cortisol levels, a hormone released during stress. This can lead to a decrease in anxiety and stress Improved concentration Improved lung capacity Calming effect on the brain Better cardiovascular health improves blood circulation

Wisdom Walk

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The science behind the incredible 'Acoustics' of ancient amphitheaters : Ancient amphitheaters have long been used as venues for large concerts and events, but how did ancient architects achieve such superb acoustics without today's modern audio equipment and acoustical treatment? In last few decades have seen modern acoustic science employ acoustic simulation software and sophisticated computer models of such open amphitheaters, even though these spaces are known solely from archaeological records and hence virtually reconstructed as acoustic models. Often such computer models are complemented by in situ measurements in some well-preserved ancient theaters using more flexible portable equipment. Recent measurements with audience present show that such near-perfect intelligibility is retained beside increased sound absorption by audience, provided that background noise levels are not excessive. Natural phenomena that made acoustics of ancient amphitheaters so remarkable were a result of simple principles like geometry and use of materials and location made an impact. Engineering and architecture used in these sites enabled sound to propagate through large distances, with clarity, as though one was located just next to the speaker. Amplifying acoustic instruments has been of interest for musicians for centuries, leading to different techniques used at smaller venues and more intimate settings. However, there is something unique about atmosphere created when standing inside an amphitheater from reverberation and resonance that can be heard to witnessing energy expand around you - it's an experience that cannot be replicated elsewhere. So how have ancient technical developments paved way for modern audio technology today in amplification, absorption, diffusion and even 3D soundscapes? Sound travels through air as waves and can be amplified or dampened depending on environment. When sound waves hit a hard surface, like a wall or floor, they bounce back and create echoes. This is what causes reverberation and amplification in large open spaces like amphitheaters. Building design played a crucial role in acoustics of ancient amphitheaters. Curved shape of amphitheater created a natural echo chamber that amplified sounds. Seats were also designed at different heights and distances from stage to create a wave of sound that could be heard at every level of auditorium. Additionally, use of marble and other hard materials throughout structure helped to reflect sound waves. While reflection was important for amplifying sound, too much echo could make it difficult to understand speech or music. For this reason, ancient architects used sound-absorbent materials like curtains, carpets and drapes to absorb excess echoes. Orientation of an amphitheater was also crucial to its acoustics. Venues were often built facing east to west so that performers were bathed in natural light during afternoon. This also helped to create an ideal environment for acoustics, as sound waves would travel in same direction as light. Additionally, orientation of stage and seating areas played a role in creating ideal acoustics. While we can appreciate ingenuity of ancient architects, modern technology has allowed us to understand acoustics of ancient amphitheaters in greater detail. Studies have shown that shape of amphitheater was responsible for up to 50% of its acoustics, with rest being attributed to reverberation, reflection and absorption. We can now understand how ancient venues would have sounded in their prime using computer simulations. Natural phenomena that made acoustics of ancient amphitheaters so remarkable were a result of simple principles like geometry and use of certain materials. Engineers of ancient times unknowingly developed best acoustic structures that are still admired today. 🎥 : A 2nd Century AD, Roman Theater in Calama (Numidia), Algeria 🇩🇿. It allows you to whisper from one end to other. 🎥© cameronazi (IG) #archaeohistories

Archaeo - Histories

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