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參數(shù)資料
| 型號： | KBS-20DB-4A-22 |
| 廠商： | AVX Corporation |
| 文件頁數(shù)： | 18/22頁 |
| 文件大小： | 0K |
| 描述： | BUZZER PIEZO 4KHZ 20MM |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 系列： | KBS, Kyocera |
| 驅(qū)動器電路： | 傳感器，外部驅(qū)動 |
| 技術(shù)： | 壓電 |
| 輸入類型： | 峰值-峰值信號 |
| 電壓 - 額定： | 10Vp-p |
| 頻率： | 4kHz |
| 聲壓級： | 70dB @ 10V，30cm |
| 可清洗： | 無 |
| 安裝類型： | 底座安裝 |
| 端子： | 導(dǎo)線引線 |
| 尺寸/尺寸： | 圓形 - 23.00mm 直徑 x 4.40mm H |
| 包裝： | 散裝 |
| 電容 @ 頻率： | 17000pF @ 4kHz |
4
Piezoelectric Acoustic Generators
Measuring Methods
Sound Pressure Level
Resonant Frequency (fr), Resonant Impedance (Ro)
The resonant frequency (fr) is defined as the reading at
the point where impedance is at its minimum. Its impedance is
defined as the resonant impedance.
Static Capacitance (Cd)
Static Capacitance measuring frequency is 1 kHz, except
for low resonant frequency devices which are measured at 120
Hz. (See individual specifications.)
Case Design for Nodal Mounting Method
The piezoelectric acoustic element with feedback tab (3-
terminal type) should be oscillated in the basic mode and
supported at the nodal point to obtain stability.
The nodal point of the disc which has diameter “a” is
located at the point of 0.224a from the edge of the disc.
However, the element has a smaller ceramic disc than metal
disc, which results in the nodal point being located at 0.15a to
0.20a from the metal disc edge.
A popular case design is shown in figure 10. The cavity is
designed in front of the transducer together with a short pipe
for the sound output release. The resonant frequency is
determined by the same formula as for the circumference
design.
SSG:
STANDARD SIGNAL GENERATOR (HP3310A)
FC:
FREQUENCY COUNTER
MIC:
MICROPHONE
SLM:
SOUND LEVEL METER
(BRUEL & KJR, TYPE 26006)
TRANSDUCER HOLDING METHOD: FREE AIR
figure 10
figure 12
S
t
V
FC
SSG
SLM
MIC
11.8"
(30 cm)
TRANSDUCER
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參數(shù)描述 |
|---|---|
| KBS-20DB-4P | 制造商:KYOCERA Corporation 功能描述:KBS-20DB-4P |
| KBS-20DB-4P-0 | 功能描述:音頻指示器及警報器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-20DB-4P-0 | 制造商:AVX Corporation 功能描述:AUDIO TRANSDUCER |
| KBS-20DB-5A | 功能描述:音頻指示器及警報器 5KHz 75dB 10nF 30% RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
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