High sensitivity electret condenser microphone---RoHS

           With the vigorous development of the communications industry, and related technology improved, the whole product on the microphone are increasingly high requirements.       Microphone mentioned herein, refers to the  electret condenser microphone, commonly known as microphone.

1.Specification:

 2.Common indicators of  microphone :

1).Sensitivity

Generally defined as:  Acoustic-electric conversion efficiency. Expressed in dB. Test standards in the relevant microphone is set to 0dB = 1V ,so that the microphone sensitivity values are negative .  Different uses will have different sensitivity requirements. For example: the laptop requires relatively high sensitivity value, to about-27db, and the Bluetooth headset is relatively low, as long-62db or so on.

Must be mentioned: the sensitivity level of the microphone is not only determined by the sensitivity of the microphone itself, but also the resistance R in the circuit. 

 This directly affects the size of the resistor to the microphone sensitivity. Similarly a microphone, such as the use of different values of R, the sensitivity is entirely different. For example: R is 1kand 2k, the sensitivity can be a difference of nearly 7db! So sensitivity is conditional, microphone manufacturers generally give the given test conditions, typically: 2.2k, 3v.

2), Frequency response:
 Generally defined as:  microphone in the audio transmission the frequency of the points corresponding to the consistency state of sensitivity. Outright microphone frequency response range is called 20 ----- 20khz.

3) Please tell us the size ,directivity ,sensitivity ,Frequency ,Impedance .(see above form ) you need.

3.Product show:

4.Application of electret condenser microphone :

 Microphone used in the Telephone ,Phone ,Headset ,Sound noise meter , Musical instrument,

and so on .

5. Order flow chart :

• Inquiry ----Please tell us the specification you need.(See above table ).
• Determine the parameters ----- Do or can not do .
• Sample -----If we can do them ,we will send the sample to you .but freight is born by you .
• Sample time ---we will arrange the samples in 1-3 working days.
• Express way ----UPS ,DHL ,FedEx ,EMS and so on ,please tell us the express way you need.
• Receipt of the samples ---When you received the samples ,please tell us the Express attitudes ( Satisfied or dissatisfied ).
• Sample test ----You will test the samples about 1 weeks .
• Test Results --- If the test is successful, we can arrange production orders according to samples . If the test is unsuccessful, please tell us why, for different situations, we do different processing .

 6. Courier service :

1. DHL,UPS: Around 3-5 working days to arrive
2. TNT: Around 3-5 working days to arrive

3. EMS: Around 8-12 days to arrive ( If to Russia, then it will be about 30 days)

4. FedEx: Around 4-7 working days to arrive.

7.Payment :

We will send you a Proforma invoice after receiving your formal order to prove it .You will find out all important information and our bank information shown on each invoice.If all information is correct,please issue a wire transfer and send us your bank sheet if you could ,and we will execute orders promptly and ship out the merchandise ASAP once we received your payment .

8.Other product :

1)According to the size : 

2)According to direcivity :

3)According to the Terminal:

9. Production Photos :

10.Certification,Compamy

The company passed the quality certification ,  and obtained a patent electronic cigarette.

Weifang Qinyi Electron Science And Technology Co.,Ltd .found in 2000.

Main product :1.Electret condenser microphone.

2. Electronic cigarette Controller .

11.Oversea market :

We have sold our products many countries: USA ,India ,UK ,Australia ,Brazil and so on.