Posted on 16-07-2010 by microbuzzer
Affect the sound and timbre of the major technical indicators:
1. Frequency range (in Hz): Speaker power amplifier distortion and the required output power rating of work under the conditions of bandwidth, that is, the speaker power amplifiers to the minimum operating frequency range between the maximum operating frequency .
2. Frequency response (unit: dB dB): Speakers [...]
Tags: sound, speaker, technical
Posted in TECHNOLOGY
| Comments (0)
Posted on 16-07-2010 by microbuzzer
Electro-acoustic devices (electroacoustic device): means the conversion between electric and acoustic devices, it is the use of electromagnetic induction, electrostatic induction or piezoelectric effects, etc. to complete the electro-acoustic conversion, including the speaker, buzzer, receiver, headphones, microphone, singing head, microphone, etc..
Acoustic Device Category:
Speaker: The speaker also called the “horn.” Is a very commonly used in [...]
Tags: electro-acoustic components, Electro-acoustic devices
Posted in TECHNOLOGY
| Comments (0)
Posted on 15-07-2010 by microbuzzer
Different according to the driving signal, the sound is divided into self-excited oscillation and his second category, there are many different versions, but the means are these two categories,
Such as: contains (not including) line, DC DC / AC AC Type, active (passive),
Tags: Active buzzer, Buzzer, passive buzzer
Posted in TECHNOLOGY
| Comments (0)
Posted on 15-07-2010 by microbuzzer
Many different kinds of buzzer, one must know a few parameters (voltage, current, drive method, size, connection / fixed mode), of course, more importantly, want to be sound (sound pressure size, frequency of high and low),
Operating voltage: electromagnetic buzzer, from 1.5 to 24V, piezoelectric from 3V to 220V are possible, but in general piezoelectric or [...]
Tags: Buzzer, quality buzzer
Posted in TECHNOLOGY
| Comments (0)
Posted on 15-07-2010 by microbuzzer
Buzzer piezoelectric and electromagnetic into the two categories:
Piezoelectric buzzer is the piezoelectric effect to drive the vibration of the vocal pieces of metal;
Electromagnetic buzzer, it is the principle of electromagnetic, power absorption when the metal diaphragm, the diaphragm is not under power when the elastic rebound,
Therefore, the piezoelectric buzzer is driven by a square wave, [...]
Tags: Buzzer, electromagnetic, Piezoelectric
Posted in TECHNOLOGY
| Comments (0)
Posted on 14-07-2010 by microbuzzer
ABS Plastic Chemical Name: acrylonitrile – butadiene – styrene copolymer, the English full name: Acrylonitrile Butadiene Styrene.
Physical properties of ABS plastics: ABS plastic weight: 1.05 grams / cubic centimeter, molding shrinkage rate 0.4-0.7%, the molding temperature :200-240 ℃, dry conditions :80-90 ℃.
Tags: ABS
Posted in TECHNOLOGY
| Comments (0)
Posted on 14-07-2010 by microbuzzer
Polyethylene terephthalate PET is the acronym in English, referred to as PET or PETP (less otherwise known as PET), in Chinese means polyethylene terephthalate, commonly known as polyester resin. It is the condensation of terephthalic acid and ethylene glycol material, collectively known as along with PBT thermoplastic polyester, or polyester.
Nuclear Medicine-PET is the abbreviation of [...]
Tags: PET
Posted in TECHNOLOGY
| Comments (0)
Posted on 14-07-2010 by microbuzzer
PPO, One of the world’s top five general-purpose engineering plastics. It has the rigidity, high heat resistance, flame retardant, high strength, excellent electrical properties and so on. In addition, the ether also has wear-resistant polymer, non-toxic, anti-pollution and so on. PPO’s dielectric constant and dielectric loss in the engineering plastics is one of the smallest [...]
Tags: PPO
Posted in TECHNOLOGY
| Comments (0)
Posted on 14-07-2010 by microbuzzer
PPS, English name: Phenylene sulfide, it has a hard and brittle, high crystallinity, flame retardant, thermal stability, high mechanical strength, excellent electrical properties and so on. PPS is heat-resistant engineering plastic in one of the best varieties, heat distortion temperature is greater than 260 degrees, after the chemical resistance of PTFE, liquidity after the nylon. [...]
Tags: PPS
Posted in TECHNOLOGY
| Comments (0)
Posted on 14-07-2010 by microbuzzer
About buzzer Case Material
ABS: is acrylonitrile, butadiene, styrene plastics
Acrylonitrile, butadiene, styrene monomer graft polymerization of three products, take them to the first letter of the English name names. It is a high strength, good toughness, good overall performance resin, widely used, commonly used for engineering plastics. Industry mostly polybutadiene rubber latex or styrene-based chain of [...]
Tags: Buzzer, Case Material
Posted in TECHNOLOGY
| Comments (0)
