ACOUSTIC CALIBRATOR; TYPE 2; CONFORMING TO IEC 60942-2003; LEVEL OF
SOUND PRESSURE (SPL) 114 DB; FREQUENCY 1 KHZ; PRECISION SPL +- 0.5 DB; TOTAL HARMONICAL DIGESTION (THD) LESS THAN 0.75 PERCENT; TEMPERATURE RANGE 0 TO 40 DEG C; ENVIRONMENTAL TEMPERATURE 23 DEGREES C; ATMOSPHERIC PRESSURE 101.3 KPA; FOOD 2 ALKALINE BATTERIES AAA
The impact of the 4D printer on the international market
The most obvious advantage of 4D printing is that objects larger than printers can be printed as just one part. Because they can shrink and unfold, items that are too large to fit in a printer can be compressed and then become full size.
