Silent speech interface is a device that allows speech communication without using the sound made when people vocalize their speech sounds. As such it is a type of electronic lip reading. It works by the computer identifying the phonemes that an individual pronounces from nonauditory sources of information about their speech movements. These are then used to recreate the speech using speech synthesis.[1]
Silent speech interface systems have been created using ultrasound and optical camera input of tongue and lip movements.[2] Electromagnetic devices are another technique for tracking tongue and lip movements.[3] The detection of speech movements by electromyography of speech articulator muscles and the larynx is another technique.[4][5] Another source of information is the vocal tract resonance signals that get transmitted through bone conduction called non-audible murmurs.[6] They have also been created as a brain–computer interface using brain activity in the motor cortex obtained from intracortical microelectrodes.[7]
Such devices are created as aids to those unable to create the sound phonation needed for audible speech such as after laryngectomies.[8] Another use is for communication when speech is masked by background noise or distorted by self-contained breathing apparatus. A further practical use is where a need exists for silent communication, such as when privacy is required in a public place, or hands-free data silent transmission is needed during a military or security operation.[2][9]
In 2002, the Japanese company NTT DoCoMo announced it had created a silent mobile phone using electromyography and imaging of lip movement. "The spur to developing such a phone," the company said, "was ridding public places of noise," adding that, "the technology is also expected to help people who have permanently lost their voice."[10] The feasibility of using silent speech interfaces for practical communication has since then been shown.[11]
Alter Ego - Arnav Kapur
Arnav Kapur, a prominent researcher from the Massachusetts Institute of Technology (MIT), has made groundbreaking strides in the field of brain-computer interfaces with his 2019 study known as AlterEgo. This remarkable innovation introduces a revolutionary concept called the "Silent Speech Interface," enabling direct communication between the human brain and external devices through subtle stimulation of the speech muscles.
Kapur's Silent Speech Interface has been hailed as a game-changer, providing individuals with a means to communicate without vocalizing their thoughts aloud. By leveraging neural signals associated with speech and language, the AlterEgo system deciphers the user's intended words and translates them into text or commands, all without the need for audible speech.
The core focus of Kapur's Research Paper lies in the development and remarkable accuracy achieved by the Silent Speech Interface. By delving deep into the intricate workings of the device, he has shed light on the complex processes that underlie its functionality, thereby offering invaluable insights into its potential applications and future advancements.
Notably, Kapur's groundbreaking research has sparked immense interest and excitement within the scientific community. The emergence of this new technology has prompted researchers from various disciplines to explore and expand upon the possibilities of brain-computer interfaces, with implications that span far beyond the realm of communication. The potential for assisting individuals with speech impairments, enabling seamless human-machine interaction, and enhancing the overall human experience has captivated the imaginations of scientists and researchers worldwide.
SpeakUP - Varun Chandrashekhar
In 2021, Varun Chandrashekhar made significant strides in the realm of Silent Speech Interface technology with his research regarding SpeakUP. Building upon the foundational work laid by Arnav Kapur's AlterEgo, Chandrashekhar's research was aimed at developing a low-cost Silent Speech Interface that could be accessible to a broader audience.
Chandrashekhar's approach was the first to involve utilizing commercially available sentences as part of the speech recognition process. By leveraging readily accessible linguistic data, he sought to create a user-friendly and cost-effective alternative to traditional voice-operated devices.
The core focus of Chandrashekhar's study revolved around identifying the most optimal signal-to-speech algorithm for these types of Silent Speech Interface devices. His meticulous research involved exploring various algorithms and methodologies to ensure the accuracy and efficiency of the system.
The significance of Chandrashekhar's work lies not only in its technological advancements but also in its potential to democratize access to Silent Speech Interfaces. By striving to make this technology more affordable and readily available, Chandrashekhar's work holds promise for empowering individuals with speech-related challenges, enabling them to communicate effectively and independently.
The emergence of SpeakUP marks another milestone in the field of brain-computer interfaces and Silent Speech technology. As this area of research continues to grow, Chandrashekhar's contribution serves as a stepping stone towards a future where seamless and intuitive human-computer communication becomes more accessible to all, ushering in a new era of assistive technology and human-machine interaction.
The decoding of silent speech using a computer played an important role in Arthur C. Clarke's story and Stanley Kubrick's associated film A Space Odyssey. In this, HAL 9000, a computer controlling spaceship Discovery One, bound for Jupiter, discovers a plot to deactivate it by the mission astronauts Dave Bowman and Frank Poole through lip reading their conversations.[12]
In Orson Scott Card’s series (including Ender’s Game), the artificial intelligence can be spoken to while the protagonist wears a movement sensor in his jaw, enabling him to converse with the AI without making noise. He also wears an ear implant.
Second Version:
A silent speech interface is a technology that translates thoughts or unspoken words into audible speech or written text without the need for vocalization. This innovative concept is often associated with brain-computer interface (BCI) technologies, which aim to establish direct communication between the human brain and external devices.
Here are some key aspects and technologies associated with silent speech interfaces:
It's important to note that while silent speech interfaces hold great promise, the technology is still in the early stages of development. Challenges include improving accuracy, addressing individual variability, and ensuring user privacy and security. Researchers and developers continue to explore and refine these interfaces to make them more practical and accessible for a broader range of users.