DoCoMo and NTT TechnoCross will start providing “window-through conversation device” that enables conversation through the window glass of automobiles etc. from November 24, 2020 by utilizing NTT’s acoustic signal processing technology. Then announced.
The product does not require a connection to a communication line or communication device, and when you talk while pressing the device against the closed window glass or acrylic plate, the built-in exciter (vibration element) vibrates the glass or acrylic plate. It is possible to convey the voice to the other party. The other party’s voice is collected by the built-in microphone (vibration pickup) of the device and can be heard with the earphone microphone. It can be used continuously for about 10 hours with two AA batteries.
When talking in both directions using a device equipped with such a microphone and speaker, echo and howling may occur and interfere with the conversation, but this product only has the voice of a person through the window. Echo canceller, which is a window talk technology that extracts information, is said to realize smooth two-way conversation without opening windows.
The usage scene is assumed to be drive-through outpatient treatment (PCR examination, etc.), nursing care, interviews at medical sites, customer service at stores, etc.