We have selected for you the most notable materials from our Hi-Fi World: from acoustic levitation to money transfers using sound and almost one hundred percent sound insulation.
If these topics are of interest to you, we invite you to cat.
A photo Sara rolling / Unsplash
- Musical roads – what is it and why they are not in Russia. We talk about how roads sound in different countries. The principle of operation is as follows – on the road surface grooves of a certain depth are made, they are located at different distances from each other. And if you drive through them at the right speed, you can hear the melody. The closest analogy from the world of audio is playing vinyl. Interestingly, in Denmark such coatings were tested in the early 90s, other well-known experiments were in South Korea and California.
- “We Heard You”: Audio Technologies in Retail. We all heard the phrase: “To improve the quality of service, all conversations are recorded.” Now it’s not just about call centers. So, Walmart installed near the cash desks audio systems that record the communication of employees with customers. Then these records are analyzed and evaluated. Even in retail, there were some voice assistants: orders for coffee through Alexa, purchase of products through Google Assistant. In general, “the future is here.”
- “It was possible”: unusual, but effective ways to use “audio” technologies. Did you know that aerophobia can be dealt with with odor headphones? An ordinary “jack” can be turned into a thermometer, an oscilloscope and an entire portable weather station. And with the help of sound waves of a certain frequency and amplitude, you can lift small objects into the air. In addition to gadgets and research, we discuss the use of audio technologies for health – we talk about the “lung flute”, which helps to get rid of some sores with the help of low-frequency waves.
- What is 8D audio: discussing a new trend. We must say right away that this is not a new technology, but a different way of delivering material. The technology is based on the structure of our ear and the so-called transfer function of the head, it is also HRTF. But the reaction to such music (there are examples in the article) is ambiguous – after all, HRTF is individual for each person.