Bluetooth headsets also use the same technology so you aren't tied down to holding your phone to your head to get the same outcome.Īnother company pushing the cancellation technology is Li Creative Technologies, and they've got some comparisons on how noise cancellation can alter the way your call sounds - it's the hiss in the background that gets hit the hardest, as you can hear. This ensures that only the sound of your voice is sent to your contact's handset. Working out which is your voice and which isn't is the tricky bit, but once that's done your phone will apply a negative sound wave to the call: put simply, it counteracts whichever sound is unwanted and makes it inaudible by reversing it. The two microphones send a signal to your handset's processor, and it compares the two soundwaves coming in.
As your voice hits the primary microphone, it comes in much stronger than when it hits the secondary. Today things are completely different as a second microphone can help remove the sound of those road works.
