Assisted Listening Device (ALD) sometimes called Assistive Listening Systems (ALS). Basically they are amplifiers that bring sound directly into the ear. They separate the sounds or you can say particularly speech, which a person wants to hear from background noise. People show different degrees of hearing at different frequencies in both ears. Research indicates that people who face the difficulty in hearing require a volume i.e. signal to noise ratio and it increases of about 15 to 25 dB in order to achieve the same level of understanding as people with normal hearing. Assisted Listening Device is used by people with all degrees of hearing loss, from mild to profound. People use Assisted Listening Devices in places of entertainment, employment, and education, as well as for home or personal use.
Types of famous Assisted Listening Device (ALD):
• Amplified telephones
• Hearing aid compatible phones
• Assistive listening devices for televisions
• FM systems for public settings
• Alerting devices
Assistive Listening Devices (ALD) are personal technologies that can help you communicate in one-to-one conversations. They are handheld amplifiers with microphones that bring the sound you wish to hear closer to your ears. These small devices capture the sound you want to hear and may filter some background noise. An Assistive Listening Devices (ALD) allows the volume increase to happen without disturbing others in the vicinity. Some are designed for large facilities such as theaters, classrooms, places of worship, Auditorium, and airports. These devices can give you peace of mind and help keep you safe, even during those times when you may not be wearing your hearing aids. Hearing aid technology is impressive and can be a big help for people with hearing loss.
Biometric access control prevents unwanted visitors from entering your premises and it has grown in popularity over the last couple of years. Biometric access control enabled with a modern type of security technology that can present a series of benefits across multiple industries. They are the analysis of biological data using technology; biometric access control is the use of this biological data to either grant or denies access to a building or area of a building. A biometric access control system manages the entry of an individual into the facilities and allows access to an authorized person only. It provides Access control for highly secured areas, control over visitor management, and Mechanism to manage the level of access.
The biometric access control can be classified as:-
• Proximity access control system
• Door access control system
• Security access control system
• Visitor access control system and many more