Headsets as Replacements for Telephone Receivers
In the age of convenience the humble telephone has most definitely not been left out of the development loop and so headsets have been made popular by offering hands-free alternatives not only to wired version, but also to handheld receivers as well. There is a huge range of devices that are available with a number of choices no matter what the application. These can range from the smallest earpieces that sit over the ear and allow communication over a mobile phone link through a device that can weigh as little as 7g. At the other end of the scale there is the over-head headset that provides much greater functionality and comfort for use over extended periods.
Mobile headsets are designed to have the maximum amount of functionality built into the smallest possible device. With the smallest mobile phone earpiece weighing in at just 7g and measuring only a few cm in length, this is certainly being achieved. Not only does the earpiece provide a communication connection with a mobile phone so that conversations can be carried out, it also utilises pairing and Digital Encryption so that conversations can be carried out without anyone else accidentally picking up the transmission, even if they have identical phone or earpieces. The pairing process provides a unique identifier so that the phone will only send to that one device.
It may be thought that the sound quality that can be achieved by using a mobile earpiece will be limited. This is not the case however as various technology is utilised to ensure that the sound quality is as high as possible. This starts with the physical design of the earpiece, which utilises an earbud to deliver the sound as efficiently as possible into the ear. In addition to this there is also noise cancelling technology used. This can be highly effective and comes in a range of formats. The most basic level of noise cancellation requires the input from a single microphone. This input is then run through processing software in order to remove general background noise from the signal. In more sophisticated devices the noise cancelling technology utilises a set of three microphones and also additional processing software. While the simpler technique is suitable for low level background noise it will be of limited use if the background noise is loud, for example out in the wind.
Wireless headsets are not just for use with mobile phones, they are also very useful in an office environment. Office headsets tend to be larger than devices used for mobile phones as comfort is a factor for extended use of a headset in an office environment, but there are also additional technical requirements for office equipment. The main one is the addition of the DECT protocol so that the headset can be used in order to connect with a landline. This is in addition to the Bluetooth protocol. Each protocol has its use, but a DECT connection also allows a much greater range between the base station and the headset to be achieved.