Noise reduction method for pickups
NY400 Asbestos Gasket Sheet for Oil-Resisting
NY400 Asbestos Gasket Sheet for Oil-Resisting
Description:NY400 Asbestos Gasket Sheet for Oil-Resisting is high temperature and high pressure oil resisting materials,it can be green,black and blue colour and can cut difference size as per clients' requestmade,it made by good asbestos fiber with oil resistance synthetic rubber ,compression heating and molding it in thick paper fashion.
Usage:NY400 Asbestos Gasket Sheet for Oil-Resisting is suitable for the mediums temperature under 400℃,pressure under 4.0MPa in gasoline,mineral oil,fuel,chemical solvent oil,alkali etc transmitted in the joints of facilities and pipelines.
TEMP:400℃(max)
PRESS:4.0MPa(max)
Dimension:1540x1360mm(recommend)
4100×1500mm; 4500 x 1500mm;2000×1500mm;
1500×1500mm;1500×1000mm;1270×1300mm; 3810×1300mm
Thickness: 0.5~6.0mm
Technical data:
Lateral Tensile Strength MPa ≧15.0
Compressibility % 7~17
Recovery% ≧50
Density g/cm³ 1.6~2.0
Normal temperature softness No cracking
Oil Resistivity Test:
Immersion IRM903 Oil keeping 5h (149℃)
Lateral Tensile Strength(MPa) ≥ 12.0
Weigh gain rate(%) ≤30
Immersion ASTM Fuel Oil B keeping 5h(21-30℃)
thickening rate (%) 0~20
Oil sealing properties under normal Temperature
Medium:RH-75 Avgas
Pressure: 16Mpa No leaking keeping 30 minutes
Nitrogen Leakage Rate ML/(h•mm)≦300
Product photoes:
Ny400 Asbestos Gasket Sheet For Oil-Resisting,Asbestos Gasket Sheet For Oil-Resisting,Oil-Resisting Gasket Sheet,Oil-Resistant Sealing Gasket Sheet HEBEI HENGDA SEALING MATERIALS CO.,LTD. , https://www.hengdasealing.com
1. This monitor can not use switching power supply, please use a good 12V DC power supply. You can use the monitor power supply or adapter specially designed for power supply. 
2. If the audio cable is connected to another audio device, disconnect it and connect it directly to the ordinary active speaker for the Walkman/PC. If noise disappears indicating that there is no problem with the monitor itself, check the connected audio device or other aspects.
3. Check whether the noise is caused by the sound self-excitation: The monitor speakers must not be too close to the monitor head, try not to test in the same room. Due to the high sensitivity of the monitor head, the sound of the speaker's feedback to the monitor's microphone will inevitably cause the sound to spur. The same room needs monitoring and headphones can be used.
4. It is best to route the cables separately. Do not use the same cable tray with strong AC power, and try to keep away from strong electromagnetic interference devices such as transformers and luminaire rectifiers. The use of 3X0.5RVVP shielded cable can also effectively avoid external interference, which requires the shield to be grounded at one end.
5. It is forbidden to connect the monitor head to the microphone (MIC) input of sound cards, mixers, amplifiers, etc., otherwise the equipment may be damaged. This is because the inside of the monitor head includes a microphone, but it also includes circuits for amplification, noise reduction, and echo processing. The output of the monitor head is a "LineOut" audio signal of 1Vpp or more.
6. Some video monitors come with speakers, but they may not work well. Use premium headphones or powered speakers for monitoring.
7. The quality of the integrated sound card on some computer motherboards is poor, and it may cause severe noise during recording. Please use a quality independent sound card such as Chuangtong.
8. Check that the volume of the monitor's sound gain potentiometer or amplifier is adjusted properly.
9. Some brands of audio distributors are not of high quality, which can lead to boring sound, cracking, etc. Please use high quality dispensers or our company's monitor head adapters.
10. Some models of hard disk video recorders only focus on video processing while ignoring audio processing may result in poor audio quality for simultaneous recording. Please disconnect the DVR first and then directly use high quality headphones or powered speakers to listen to the audio line. If the sound quality is good, it can be determined that there is no problem with the quality of the monitor head.
11. If it is confirmed that the noise originates from the environment, the APM212 noise reduction adapter can be used to effectively filter the ambient noise.
