Knowledge

​Babies’ cognition of the world mostly comes from picture input and sound input. In our limited environment, we cannot let babies see real cats, dogs,

Audio books are composed of paper books and reading pens. When in use, you only need to scan the books with the reading pen, and the reading pen can e

​For audio books, focus on the darkest areas of the color pictures.

On the printed product, use a barcode reader and a point reading pen to detect the data and sound of the printed product in the hole, and compare it w

According to the logical waveform design of audio books, each functional area corresponds to a sound, so you can use a point reading pen to sample poi

Based on the design of audio books, each functional area that can be sounded has a corresponding 6-bit data, which can be read with a dedicated code r

​The water supply system must be cleaned before printing, especially all oil stains must be removed, and the filter element must be replaced.

Different printing machines should be calibrated according to the standard of the operation manual; finally, use white paper to print the solid ground

​In the printing process, the printing signal bar shall be used to detect the restoration of the dots, and it shall be ensured that 3% of the dots can

The current printing methods of audio books are mainly divided into four-color printing and five-color printing.

​According to the sounding principle of audio books, the logic waveform diagram composed of dot matrix should be printed with black ink

​Early childhood education can be divided into broad sense and narrow sense.