Acoustic measurements of the environment, interior, exterior, silence room, commingling room are applied. 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 panel, 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 finger
Type of sound field. Freedom field
1/2 diameter
Iec61672
Frequency response (hz) 6. 3 ~ 20k
(mv/pa) (±2db) 50
Dynamic (dba)* 17 ~ 146
Bottom noise (dba) averaged the hole
Use temperature range (°c) -30 ~80
Use wetness 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 w2
Connecting screws m11. 7-60un
Auxiliary amplifier model ma231 ma221 ma231t