Amazon's DOT Alexa device is shown inside a house in this picture illustration taken October 1, 2021.

LAS VEGAS, June 22 (Reuters) - Amazon.com Inc (AMZN.O) wants to give customers the chance to make Alexa, the company's voice assistant, sound just like their grandmother -- or anyone else.

The online retailer is developing a system to let Alexa mimic any voice after hearing less than a minute of audio, said Rohit Prasad, an Amazon senior vice president, at a conference the company held in Las Vegas Wednesday.

Amazon hopes the project will help Alexa become ubiquitous in shoppers' lives.

Another Amazon executive said Tuesday that Alexa had 100 million customers globally, in line with figures the company has provided for device sales since January 2019.

Prasad said Amazon's aim for Alexa is "generalizable intelligence," or the ability to adapt to user environments and learn new concepts with little external input.