The phrase "a noticeable bit" is correct and usable in written English.
It can be used to describe a small but significant amount of something that can be easily observed or perceived.
Example: "There was a noticeable bit of improvement in her performance after the training."
Alternatives: "a significant amount" or "a discernible portion".
A noticeable bit of the audience left at intermission, after the Bach, and even for people who relish both sets of variations, by 11 p.m. it was difficult to match Mr. Schiff's preternatural focus.
Even with all that horsepower, there's a noticeable bit of visual lag when swiping back and forth through different homescreens because of all the widgets Samsung has crammed into them by default.
According to Paul Dietz of Microsoft's href="http://www.microsoft.com/appliedsciences/"> Applied Sciences Group, it all comes down to latency — he notes average touchscreens have a latency of a 100ms, which yields a noticeable bit of lag between a user touching a screen and the screen displaying a reaction to it.
If there is a noticeable smell, use a bit of perfume/body spray to mask it.
I'd start off slow, because there's a bit of a noticeable lag that takes some getting used to.
Easily, we can see that the lattice structure results in a noticeable improvement in terms of achievable bit rate.
It was a noticeable and calculated transformation and if it seemed a bit silly and over-the-top at first, it has served her well over time.
Chomping at the bit at early sobriety, completely uncomfortable in AA (despite a noticeable eagerness to appear normal), and unaware there were other recovery options, I happily agreed.
There was a bit of an Internet outcry when the news went out, but it hasn't made a noticeable difference in Craigslist's position.
The hybrid's throttle has a bit of a motorcycle feel: As soon as you let off the gas, there is a noticeable letdown in acceleration, which is unusual for a vehicle with an automatic transmission.
"It was a noticeable difference".
