The suitable and corresponding cell phone jammer

Post-sound chamber of sufficient size, the leakage hole away from the SPEAKER; post-sound chamber can improve the effect of sound frequencies in the low-frequency part of the basic frequency of the sound is the low frequency, after the sound chamber, then the sound will be very macro bright. Speaker around a lot of holes, such as sub-shell gap, the side key hole, try to design specialized sealed after the sound chamber. The spk amplitude of the sound chamber before and after the equal and opposite phase, and therefore can not be exchanged, it must be before and after the sound chamber to isolate. Otherwise, the two phase superimposed, the sound becomes very small. Note that space dust network, leaving a paste. SPK's alignment to avoid shell isobar. SPK in front of non-woven are thin and sparse quality to the sound will not be muffled.  cell phone jammer  really validly acts on isolating signals.
Proposed to use Mesh, do not use non-woven. Lead length is convenient for welding, using the diameter of 32 models, end stripping length 1.5mm. Whether there are appropriate foam as the gap between the buffer SPK and PCB. For shrapnel exposure SPK, the PCB pads and contact pads X / Y direction must be the center (contact pads must be designed as compression state) and unilateral greater than the contact pads above 0.5. The shrapnel must design the original and the compressed state of the latter two. Space, then try to bring their own sound chamber. Consider the ESD grounding and TVS tube; speaker connected with the outside world, ESD, it is easy to break into the speaker around the deck, power supplies, connectors, and other critical devices must also be synchronized to consider a good grounding. The customer should choose the suitable and corresponding cell phone jammer .
The handset must be the sound chamber foam, and before the sound chamber height must be more than 0.5mm (foam compression). Or audio loudness, however, and ESD is also greatly affected. Clamshell machine vocal style of the SPEAKER / REC one-sided, unilateral clearance of 0.2 REC and locating ring, outer locating ring is not sealed, otherwise SPEAKER on the back of the vent blocked, sound, unable to pay. Monomer receiver attention to compress, to prevent non-sealed lead to a small voice. The shrapnel must design the original and the compressed state of the latter two. Flip the receiver of the machine, close the phone, the sound hole can not and mic overlap, otherwise there will be significant in the lid whistle. The proposal to stagger distance> 6mm. The shrapnel receiver may top shell, resulting in LCM into the gray. Then,  cell phone jammer can effectively play a part.
Shrapnel can not be too hard. RVE before and after the amplitude of the sound chamber equal and opposite phase, and therefore can not be exchanged must isolate the front and rear sound chamber. Consider TVS pipe; receiver connected with the outside world, the ESD is very easy to break into the receiver around the connectors and other key devices also sync to consider the good ground. MIC into the size and location of the sound hole: the MIC aloud hole area ≥ 1.0 the square of millimeters, or the hole ≥ φ1.0 to prevent the whistle; a sound position to the underside of pronunciation, a sound position coplanar with the receiver more likely to lead to whistle.   phone jammer is really strong in blocking signals.