The DA34 Option measures the reverberation time of a room. The DA34 is use with DS30 analyzer. The reverberation time is how long it takes for a sound to decay by 60dB in a room. Measurements taken can be stored and printed. No computer is needed with this option.
Measurement Frequencies: 125, 250, 500, 1000, 2000 & 4000Hz.
Measurement Range: 0.1 to 10s in 0.01s (1/100ths) increments.
Option Kit Contains: An upgraded EPROM device, a jumper cable to internally connect the circuit board to the front panel and a jumper cable to connect the DS to an external gate source such as  PN31 Roze ruis generator 95-97dB 1kHz.
A front panel overlay is available as a separate option.