Mpa 436a 1/4-inch free field speaker
Functional characteristics:
• 1/4 inches free field speaker
• sensitivity (@250 hz): 11 3 mv/pa (+3 db)
• frequency response: 20 hz ~ 10 khz (+2 db)
10khz~20khz (+3db)
• dynamic scope: 29 dba~140 db
:: polarized voltage: 0v (pre-polarized)
• average pressure: average front pressure
Icap pre-electric amplifier (unseparable integration)
• options for teds (ieee 1451. 4)
Scope of application:
• low-cost speaker
• applies to array applications such as near-field holograms (nah), beam formation (beamforming)
Mp436a is a 1/4-inch free field acoustic speaker, suitable for a non-reflective, semi-free field in
Line measurements, which are pre-polarized without external polarized voltage, are accompanied by a non-separable ibp pre-electric amplifier (option teds)。
Mp436a average pressure method, frequency range 20 hz ~ 10 khz (+2 db), 10 khz ~ 20 khz (+3 db)
Measurement of acoustic pressure levels up to 140 db. Each mp436a was subjected to a high-acoustic pressure test before leaving the plant to verify that its total distortion was 3 per cent when it reached the rated high-acoustic level。
Mp436a is suitable for large-scale use of acoustics, where single-body cost requirements are stringent, such as near-field holographic (nah), beam formation (beamforming) array applications. The use of mp436a not only controls the overall costs of arrays, but also meets the basic sensitivity and phase i. Motive requirements. At the same time, teds features can be selected to support data acquisition devices to directly read acoustic information, including acoustic models, serial numbers, sensitivity, etc. The current prestigious teds speaker in beijing supports the ieee 1451. 4 standard, with the default use of v0. 9 for additional data acquisition equipment and the choice of v1. 0 according to user requirements。
Each mp436a is preceded by an independent calibration data chart containing information such as sensitivity and frequency response。
Technical parameters
Type of sound field: freedom field
One fourth diameter
Level iec 61672: level 1
Sensitivity@250 hz (mv/pa) (+3 db): 11. 3
Polarized voltage: 0 v (pre-polarized)
Frequency response (hz): 20~10k (+2db), 10k~20k (+3 db)
Dynamic range (dba ~ db): 29 ~ 140
Self-noise (dba): 29
Loud pressure level (db): greater than or equal to 140 (3% not true)
Equal pressure method: average front pressure
Pre-emplifier: unseparable integration
Output resistance (one time): large output voltage (vpeak): ±5
Power supply: icp (2ma ~ 20ma, typical of 4ma)
Output interface: smb
Teds: optional, matching ieee 1451. 4 (default v0. 9, optional v1. 0)
Use temperature range (°c): -10~50
Use humidity range (%rh): 0~90
Structure size (mm): φ7 x 34. 1
Weight (g): 5. 0
