[
 {
  "value": "331.29",
  "sigma": "0.066",
  "source": "Wong, J Acoust Soc Am 79, 1359 (standard dry air, 0 C, 101.325 kPa, about 200 ppm)",
  "year": "1986",
  "field": "acoustics",
  "id": "Q19",
  "unit": "m/s",
  "quantity": "speed of sound in dry air",
  "grade": "primary value, uncertainty secondary, PRIOR-ART row 22",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 }
]