8.A small loudspeaker designed to reproduce high-pitched sounds in a high-fidelity audio system.高频扬声器在高保真度的放声系统中用来产生高频声的小扬声器 9.HF transistorized signal generator晶体管高频信号发声器 10.EMIT (Electromagnetic Induction Tweeter)电磁感应高频扬声器 11.Linear Acoustic Analysis of...
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Trap for small animals - has ultrasonic generator producing high pitched noise similar to that made by young of species and has anti-rodent powderThe trap for small animals, esp. rats and mice, consists of an entry gate (12) to small cage (10) with guide walls (14) wich discourage ...
I built this circuit (with mosfet) exactly, but it still gave me high pitched whines (noise) in some fans. I replaced C2 with a ceramic 100 nF, C1 with 10 nF, and increased R4 to 570 Ohm. Now I can no longer hear the noise in any fan I use, and the starting voltage measured ...
First, they produce high-pitched squeaks with F0 reaching up to 2 kHz [24], also termed “chirps” [25, 26] or “squeals” [27]. These high-pitched sounds are absent in the naturally occurring repertoires of the African elephant species, the African savannah elephant (Loxodonta africana...
Shaft generator Gearbox Main Engine Shaft parts (including shaft bearing, sealing, intermediate bearings etc)ABS inspection: Specifications: Product name High quality marine boat underwater bronze propeller Type Fixed pitched and controllable pitch Material Bronze, stainles...
I pitched my tent across from the lodge, Bill assuring me that the sound of the generator would keep the “critters” away. Fast asleep, I woke in a panic: the earth was shaking violently. My hands fumbled to open the zipper of my tent, and I leapt out to stare into the dim light...
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Trap for small animals - has ultrasonic generator producing high pitched noise similar to that made by young of species and has anti-rodent powderThe trap for small animals, esp. rats and mice, consists of an entry gate (12) to small cage (10) with guide walls (14) wich discourage ...
Trap for small animals - has ultrasonic generator producing high pitched noise similar to that made by young of species and has anti-rodent powderThe trap for small animals, esp. rats and mice, consists of an entry gate (12) to small cage (10) with guide walls (14) wich discourage ...