6027咪头 2.8mm针长 助听器咪头

no.

序

号

parameter

参数

symbol

符号

condition

测试条件

limits范围

unit

(单位)

min.

Zui小值

center

中心值

max.

Zui大值

1

sensitivity

  灵敏度

s

f=1khz,s.p.l=1pa,0db=1v/ubar

-56

-58

-60

db

2

output impedance

输出阻抗

zout

f= 1khz

2.2

kω

3

current consumption

消耗电流

idds

vcc=4.5v , rl=2.2kω

150

450

ua

4

signal to noise ratio

信噪比

s/n

f=1khz,s.p.l=1pa

60

db

5

decreasing voltage

减电压灵敏度

△s-vs

vcc=4.5v to 1.5v

-3

db

6

operating voltage

工作电压

1

10

v

7

maximum input s.p.l

Zui大输入声压

110

db

5. typical frequency response curve (far field)频响曲线

far field measurement condition自由场测试条件

temperature温度：20±2℃

bias voltage基准电压： 4.5v (with 2.2kωseries resistor 2.2kω电阻)

acoustic stimulus :1pa (94db spl at1khz) at 50cm from the loud-speaker.

声音条件：the loud-speaker must be calibrated to make a flat frequency response input signal

        距离扬声器50cm出产生1pa声压。 扬声器必须先用标准输入信号事先校准。

position: the frequency response of microphone unit measured at 50cm from the loud-speaker

位置 ：   扬声器距离待测话筒50cm.

6.dimensional drawing外形图