Most popular technologies used in TV assistive listening devices(ALDs)
According to soundaids team several years focusing in TV listening device experiences,we shall analysize
most often used wireless audio signal transmission technologies used in TV assistive listening devices(ALDs) nowadays.
we shall write basically following timeline with each technology advantages and disadvantages:
(TV remote control or remote control for air conditioner are the most commom products we have seen at home with IR technology)
There is a famous brand in USA for TV listening devices uses IR technologies a lot insider their products for decades.
Advantages:stable signal(no interferences),easy operation,cost low;
Disadvantages:short distance(less than 10 meters),must be in line and can not be blocked,audio quality low(only mono sound)
(In fact before 2.4G technology gets popular,there is a world famous high end audio brand introduces 863M or 900M UHF TV assistive listening devices and also IR types,but most 863M or 900M audio signal is analogue,so we guess this is why it never been very hot)
There are so many technolgies in very close 2.4G signal frequency range,so anti-signal-interference ability is key for 2.4G TV listening device quality.
Soundaids 2.4G TV listening aids SATV applied advanced and highly integraated 2.4G chip together with FHSS technology,enables it to avoid any possible signal interferences.
Customers will have little chance to notice there is any nosie while hearing TV or other audio.
Advantages:high sound quality(users can choose from mono sound to stereo sound),easy operation,long distance and can through Obstacles(walls,ceilings,etc).
Disadvantages:high cost for good 2.4G chips,very easy to get interferences(customers will hear nosie or no audio at all sometimes) for cheap or primary 2.4G chips.
Bluetooth is now the hottest technology worldwide,and more and more groups and products are joining the bluetooth world.
I think most people know most and use most frequent in the above three technologies is bluetooth.
Most hearing aids nowadays also add bluetooth,so can connect it with any bluetooth devices.
As for TV assistive listening devices,what is the good and bad for bluetooth technology?
Good:universal,can connect with most regular headsets,phones or ipads,any devices with bluetooth.
Most important,can connect with phones,now all smart phones all have bluetooth.
So these TV listening device with bluetooth can connect to their phones can make phone calls so easy.
We personally think right now it is one of the most function for such bluetooth TV hearing aid.
Bad:complicated operations.bluetooth connection can be a very big challening for elder people.
Especially when,sometimes disconnected,and then need to re-pair and connect again.
Also the bluetooth TV listening devices start times takes much longer than others,so some customers,especially elder people,may think something wrong with it.
At last,time delay,right now its time delay time is acceptable for regualr customers for watching TV.
But if for picky customers,then bluetooth TV assistive Listening devices may be a problem for them.
Also its distance is only 10 meters,but can through obstacles.