469-P5-HI-A20
469-P5-HI-A20
傳聲器將噪聲轉(zhuǎn)換成電信號(hào),由前置放大器變換阻抗,使傳聲器與衰減器匹配。放大器將輸出信號(hào)和加到計(jì)權(quán)網(wǎng)絡(luò),對信號(hào)進(jìn)行計(jì)權(quán),然后再經(jīng)衰減器及放大器將信號(hào)放大到一定的幅值,送到均方根檢波器,在指示表頭給出噪聲聲級(jí)的數(shù)值。
衰減器每檔衰減10dB,多檔衰減器使聲級(jí)計(jì)具有較寬的且程范圍。
聲級(jí)計(jì)中常用A, B, C三種標(biāo)準(zhǔn)計(jì)權(quán)網(wǎng)絡(luò)。它們是從等響曲線出發(fā),逆反加權(quán),對不同頻率的聲音信號(hào)進(jìn)行不同程度的衰減,使得儀器的讀數(shù)能近似地符合人耳對聲音的響應(yīng)。
A網(wǎng)絡(luò)是模擬人耳對40phon純音的響應(yīng),它使電信號(hào)中、低頻段有較大的衰減。近年來,在噪聲測量中,經(jīng)常采用A網(wǎng)絡(luò)測得的聲級(jí),代表噪聲的強(qiáng)弱。
備貨,備貨,降降降,火火火,火火火……
————————————————————————————————
公司名稱:廈門泰尼電氣有限公司
:小黃(銷售代表)
:
傳真號(hào)碼:(麻煩備注01006收)
號(hào)碼:
:
誠信經(jīng)營,質(zhì)量為首,誠信*,泰尼電氣小黃竭誠為您服務(wù)?。?!
————————————————————————————————
DESTACO 247-U VERTICAL CLAMPS U-SHAPED CLAMPING BAR, FLANGED BASE, 10PK
DESTACO 9530GL L.H. PNEUMATIC SWING CLAMPS, 30MM, LESS ARM, W/ G-PORTS
DESTACO 9530GR R.H. PNEUMATIC SWING CLAMPS, 30MM, LESS ARM, W/ G-PORTS
DESTACO 9530L L.H. PNEUMATIC SWING CLAMPS, 30MM, LESS ARM, 1/8 NPT
DESTACO 9530R R.H. PNEUMATIC SWING CLAMPS, 30MM, LESS ARM, 1/8 NPT
DESTACO 8215-LA LESS ARM PNEUMATIC CLAMPS SWING CYLINDER CLAMPS
DESTACO 8216-LA LESS ARM PNEUMATIC SWING CYLINDER CLAMPS
COMAU 10120660 ROBOT CARD
ALLEN BRADLEY 1326-CPB1-030 SERIES B CABLE MOTOR POWER 30 METER
TURCK RKE 4.5T-30-RSE 4.5T/CS12855 M/F 5P S/S 30M M12 EUROFAST
NSK 7010CTY-DUL-P4 SUPER PRECISION BEARING ANGULAR CONTACT 15 DEGREE
NSK 7210CTRDULP4Y
SICK SICK S30A-XXXXCA I/O MODULE ADVANCED FOR S3000
FAFNIR 3MM9106WI TUL PRECISION BEARING
SIEMENS 6SL3053-0AA00-3AA0 SINAMICS VOLTAGE SENSING MODULE VSM 2PE A
SCHUNK APS-M1E ANALOG POSITION SENSOR SYSTEM ALTERNATE PART # 302064
DANAHER MOTION DBL3H00250-0R2-000-S40 MOTOR 30A 1.13KW 400V W/ CD
BANNER MSR2424Y MINI-SCREEN RECEIVER MIN OBJECT SENS. 0.75" 19MM
ALLEN BRADLEY 140U-H6C3-C40 SERIES B MOLDED CASE CIRCUIT BREAKER
SMC PF2W720-F04-67 DIGITAL FLOW SWITCH