Directional and parametric speakers are a unique type of speaker that use ultrasonic waves to produce highly targeted, directional sound. Unlike conventional speakers that spread sound in all directions, these speakers create a narrow beam of sound that can be directed to specific areas.
The key features of directional and parametric speakers are:
They use ultrasonic waves modulated with audio signals to generate sound. This allows them to create a focused, directional sound beam.
They can localize sound to a targeted area, while maintaining quiet in the surrounding space. This allows for private audio zones.
They have a more limited range compared to conventional speakers, typically 1-15 meters.
They are used in applications like museums, retail stores, public address systems, and more to deliver targeted audio without disturbing nearby areas.
Based on the search results provided, some of the key companies that manufacture and sell directional and parametric speakers include:
Focusonics[1][4] – A manufacturer of high-quality parametric speakers, offering models for larger (3-15m) and shorter (1-5m) operating distances.
Panphonics[2] – A leading directional speaker manufacturer that specializes in electrostatic speaker technology.
Audfly[2][5] – A Chinese company that produces directional speakers using ultrasonic parametric technology.
Akoustic Arts[3] – Provides directional speaker solutions and consulting services for various applications.
So in summary, directional and parametric speakers are a specialized audio technology used to create targeted sound fields, and companies like Focusonics, Panphonics, Audfly, and Akoustic Arts are some of the key manufacturers and sellers of these products.[1][2][3][4][5]
The Catchflow SRAY is the world's smallest directional speaker that can focus sound in a narrow beam, allowing only the intended listener to hear the audio without disturbing others around them.[1][2][3][4]
Some key features of the SRAY directional speaker:
It uses ultrasonic propagation technology to bind the audio in a unidirectional channel, similar to how a flashlight focuses light in a beam.[3]
This allows the sound to be directed at a specific person or area, while people outside the audio beam hear nothing.[3]
It can be used for private listening without disturbing others, such as in libraries, public spaces, or at home.[3]
The SRAY is compact and portable, small enough to fit in the palm of your hand.[3][4]
It has both a directional mode and an omnidirectional mode, allowing it to function as a regular speaker as well.[2][3]
The directional speaker technology helps reduce noise-induced hearing loss compared to using headphones or earbuds.[3]
Overall, the Catchflow SRAY provides a unique and private audio experience by tightly focusing the sound output, making it useful in a variety of settings where controlling sound dispersion is important.[1][2][3][4][5]
The “ubogi” (literally “of God”), “iurodivye” (“God's fools” or “holy fools”), and “proroki” (“prophets”) were terms used in traditional Ukrainian and Russian cultures to refer to individuals with physical and intellectual disabilities. [1][2][3][4]
These individuals were often integrated into their communities and were not socially isolated. They were associated with the Orthodox Church and were sometimes respected and revered, as they were believed to have special powers to predict the future and heal afflictions. [1][2][3][4]
The “ubogi” and “iurodivye” were often seen as “God's fools” or “holy fools” and were sometimes even local celebrities who were tolerated and cared for by their communities. They would often live in the basements and kitchens of the homes of wealthy merchants, who believed that donating to them would bring good luck in business. [1]
The “proroki” or “prophets” were individuals with disabilities, such as blindness, who were known for their abilities to predict the future and provide healing services. One famous example was Ivan Yakovlevich, who lived in squalid conditions in a hospital-asylum in Moscow but was visited by crowds of people, including nobility, who sought his services. [1]
In contrast, individuals thought to be mentally ill were sometimes treated with more fear and negative connotations, referred to as “duraki” or “fools” and “idiots”. The tsarist state also began to play a more active role in regulating the lives of people with disabilities, such as requiring those suspected of mental disabilities to appear before the Senate for certification. [1][3]
#!/bin/bash
# Get the active network interface
interface=$(ip route | awk '/default/ {print $5}')
# Send an ARP request to a random IP address on the network using the active interface
arping -I $interface $(ip route | awk '/default/ {print $3}' | cut -d"." -f1-3).1
# Check if the ARP request is successful
if [ $? -eq 0 ]; then
echo "ARP request successful. MAC address filtering may not be enabled."
else
echo "ARP request failed. MAC address filtering may be enabled."
fi
Good all-in-one runtime installers for Windows that are still maintained. One such example is the “All in One Runtimes” software, which integrates essential runtime packages and installs them automatically[1][2][5]. Another option is the “Visual C++ Redistributable Runtimes All-in-One” package, which contains the latest version of all VCRedist Visual Studio C++ runtimes and can be installed with a single click[3][4]. Both of these options are regularly updated and can help avoid problems with programs that require specific runtime environments.
The website “pcidatabase.com” was a helpful resource for identifying unknown hardware and finding the right drivers for computer hardware. However, it seems that the website is no longer available. Several alternatives have been suggested, such as “devicehunt.com” and “pcilookup.com,” which serve a similar purpose of identifying unknown devices using vendor and device IDs. Additionally, “pciutils/pciids” on GitHub is recommended as an alternative for identifying unknown devices. If you have an unknown device, you can use these alternatives to find the necessary information and drivers.
The “pci.ids” file, which contains a list of all known PCI ID's, is maintained by the “pciutils” project. The file is mirrored on GitHub at the “pciutils/pciids” repository[1]. It is also available from the website “https://pci-ids.ucw.cz/" and its mirror on GitHub[4]. The “pci.ids” file is used to display the names of devices based on their PCI IDs. It is not part of the “pciutils” package but is included in many Linux distributions as part of the “pciutils” package[4].
To create a link with a timestamp for a YouTube video, you can use the following format: https://www.youtube.com/watch?v=VIDEO_ID&t=6m30s. Simply replace “VIDEO_ID” with the actual ID of the YouTube video and “6m30s” with the desired timestamp. This will direct the viewer to the specific time of 6 minutes and 30 seconds in the video.
Here's an example of how the link should look: https://www.youtube.com/watch?v=2C-QlPb3J74&t=6m30s
This format will allow you to share a direct link to a specific part of a YouTube video.
Intermittent fasting can potentially influence “hangryness” as a coping mechanism. “Hangry” is a term that combines hunger with anger and describes irritability during hunger[2]. Some individuals experience irritability and mood swings when they are hungry, and intermittent fasting may initially exacerbate these feelings. However, proponents of fasting suggest that the “hangriness” dissipates over time as the body adjusts to the fasting routine[5]. Additionally, there are several strategies to curb cravings and manage hunger during intermittent fasting, such as increasing protein intake, staying hydrated, getting enough sleep, and keeping busy and distracted[3][4]. While there is anecdotal evidence that fasting can help reset emotional eating patterns, it's important to approach fasting with caution, especially if you have underlying health conditions. If you are considering intermittent fasting, it's best to consult with a healthcare professional to ensure it is safe for you[5].
Frequency illusion, also known as the Baader-Meinhof phenomenon or frequency bias, is a cognitive bias referring to the tendency to notice something more often after noticing it for the first time, leading to the belief that it has an increased frequency of occurrence[1]. This phenomenon occurs due to increased awareness of a phrase, idea, or object, such as hearing a song more often or seeing red cars everywhere after learning about them[1].
The main causes behind frequency illusion are selective attention and confirmation bias[1]. Selective attention refers to the process of selecting and focusing on relevant stimuli while ignoring distractions, meaning that people have the unconscious cognitive ability to filter for relevant information[1]. Confirmation bias occurs when an individual affected by frequency illusion starts looking for reassurance of this increased frequency, believing their theories to be confirmed as they focus only on the supporting evidence[1].
Frequency illusion can have various consequences, ranging from harmless to serious outcomes. For example, in the fields of criminology and medicine, it can lead to misdiagnoses or missed key information[2]. In the case of people with certain psychological disorders, such as schizophrenia, frequency illusion may aggravate their conditions by causing them to confirm their own suspicions based on their delusions[3]. For most people, however, frequency illusion is an interesting phenomenon that does not lead to major effects[3].
ScummVM stands for Script Creation Utility for Maniac Mansion Virtual Machine[1]. It is a set of game engine recreations that allows users to play supported adventure games on their platform of choice[1][2]. ScummVM is a re-implementation of the part of the software used to interpret the scripting languages such games used to describe the game world rather than emulating the hardware the games ran on[1]. This means that ScummVM allows the games it supports to be played on platforms other than those for which they were originally released[1].
ScummVM was originally designed to play LucasArts adventure games that use the SCUMM system, but it also supports a variety of non-SCUMM games by companies like Revolution Software and Adventure Soft[1]. The team behind ScummVM also adds improvements such as bug-fixes and translations and works with commercial companies such as GOG.com about re-releases[1]. ScummVM is distributed as free software under the GPL-2.0-or-later license[1].
ScummVM does not provide any of the original assets for the games it supports, and expects the user to properly own the original game's media so as to use the software legally[1]. The official project website offers games that are freeware that work directly with ScummVM[1]. ScummVM is available on various platforms, including iOS and Android[2][4].
To create a QR code for a WiFi SSID on Linux terminal, you can use the qrencode tool. Here are the steps to follow:
Install qrencode using the command sudo apt install qrencode.
Prepare the WiFi information using the following format: WIFI:S:{SSID name of your network};T:{security type - WPA or WEP};P:{the network password};;. For example, if your WiFi SSID is “mysecurewifi”, it is using WPA, and the password is “mysecurewifipassword”, the format would be WIFI:S:mysecurewifi;T:WPA;P:mysecurewifipassword;;.
Generate the QR code image file using the command qrencode -o mywifi.png 'WIFI:S:mysecurewifi;T:WPA;P:mysecurewifipassword;;'. If the generated image is too small, you can increase the size of the dot pixel using the -s option, for example: qrencode -o mywifi.png -s 10 'WIFI:S:mysecurewifi;T:WPA;P:mysecurewifipassword;;'.
You can then share the file with anyone or print it for people who would like to use your WiFi[2].