A new study says that teenagers spend an "astounding" nine hours a day absorbing media and using digital technology while pre-teens consume about six hours on a daily basis.

Common Sense Media released an extensive report on Tuesday revealing how much time young people spend entertaining themselves with streaming video, social media apps, listening to music and playing video games.

According to the study, two-thirds of teenagers said they listen to music every day, while 58 percent said they watched television each day and only 45 percent reported using social media every day. Teens also said that they enjoyed listening to music much more than using social media.

Meanwhile, the report, which surveyed over 2,600 young people ages 8 to 18, showed that "tweens" from 8 to 12 years old are spending six hours with media.

"On any given day, American teenagers (13- to 18-year-olds) average about nine hours of entertainment media use, excluding time spent at school or for homework. Tweens (8- to 12-year-olds) use an average of about six hours' worth of entertainment media daily," the report reads.

Researchers also called it "astounding" that American children are consuming six to nine hours' worth of media each day.

"The sheer volume of media technology that kids are exposed to on a daily basis is mind-boggling," said James Steyer, CEO and founder of Common Sense Media, in an interview with NBC News.

"It just shows you that these kids live in this massive 24/7 digital media technology world, and it's shaping every aspect of their life. They spend far more time with media technology than any other thing in their life. This is the dominant intermediary in their life," he added.

Most of the time that young people spend consuming media in on some type of screen. Teens spend more than 6.5 hours on consuming media on laptops, smartphones and tablets, while tweens reported more than 4.5 hours of screen time per day.

"I just think that it should be a complete wake-up call to every parent, educator, policymaker, business person (and) tech industry person that the reshaping of our media tech landscape is first and foremost affecting young people's lives and reshaping childhood and adolescence," said Steyer, the author of "Talking Back to Facebook: The Common Sense Guide to Raising Kids in the Digital Age."

Steyer also made note that many kids do not shut off technology when they're doing homework and schoolwork. Instead, they text and use social media while working, the survey found. Half of teens say they "often" or "sometimes" use social media or watch TV while doing their homework, whereas 60 percent say they text and more than 75 percent say they listen to music while completeing class assignments.

However, Steyer warns that multitasking when doing schoolwork is harmful.

"One of the most interesting findings in this landmark research study is the fact that two thirds of teens think that they can multitask while doing their homework and they're wrong. They simply can't," he said.

"The evidence from some of my colleagues at Stanford and the Harvard (education) school is clear. You cannot multi-task and do your homework effectively, but two out of three American teens think that you can," he added. "It gets in the way of your ability to concentrate and to synthesize information well."

"It's completely obvious that you can't multitask and be as effective and competent," he said.