Acoustic/pre-polarized/acoustic measurements model: mpa201 library no. D140771

Acoustics/pre-polarized acoustics model: mpa201 library: m140771

The application is for sound measurements in the environment, in the car, outside the car, in the silence room, and in the mix room. When the speaker is placed in the sound field, the original sound field is changed. The free-field acoustics measure the acoustic pressure that eliminates the impact of the acoustics on the acoustics。

Pre-polar acoustic transmitters: the charge is injected into the antipolar material of the acoustic plate, which allows for the presence of an electric field between the film film and the postpolar plate, which is equivalent to the function of polarized voltage, without external polarized voltage。

Technical indicators
Type of sound field. Freedom field
1/2 diameter
Iec61672 type i
Frequency response (hz) 6. 3 ~ 20k
(mv/pa) (±2db) 50
Dynamic scope (dba)* 17 ~ 146
Underground noise (dba) < 17
Hole of pressure
Use temperature range (°c) -30 ~80
Use humidity range (rh) 0 ~ 98%

Capacitive (pf) 16
Prevalent cavity volume (mm3) 40
Temperature coefficient (db/°c) 0. 005
Humidity factor (db/%rh) 0. 003
Pressure factor (250 hz) (db/kpa) - 0. 004
Structure size iec 1094-4 type ws2
Connection screw m11. 7-60uns
Auxiliary amplifier model ma231 ma221 ma231t