1. A mode pare model of a geophone is presented with the emphasis on modes sli ding.

2. The performance test of geophone is effected by many factors.

3. It is usually use geophone array to receive seismic signal in seismic exploration.

4. The amphibious geophone is suited for operating in land, wetland, lake and marsh etc.

5. Since its unique manufacturing technology, the MEMS geophone has ultra-low noise, larger dynamic range and very high vectorial fidelity performances.

6. We can produce different pattern of geophone string to satisfy the customers.

7. Consider the reflecting point halfway between geophone positions 10 and 11.

8. New high resolution seismic geophone is a kind of sensor which transforms mechanical energy into electricity.

9. On the basis of magnetic-electric geophone's characters, we design a new magnetic annulus style geophone, which can get a well-disposed wider magnetic field to make a great effect.

10. The new design of digital geophone used in the occasion of high resolution seismic prospecting will pay an important roll in a new kind of seismography.

11. According to the method, the relative overdamping can be expressed in a linear function of the product of the width of half peak of the response curve by the nature frequency of the geophone.

12. Then two methods available for measuring the relative overdamping of a geophone were discussed.

13. It was devoted to the relative damping measurement for overdamped geophone with a moving coil of constant velocity.

14. The results of field test showed that adopting cascade geophone pattern can be results of good continuation of phase, enhanced amplitude and high signal-to-noise ratio on the records.

15. This paper describes the process on how to replace thermal printer of SMT-100 geophone tester with stylus printer in detail.

16. Second, the air damping value is measured by using the air dampingmeter to test the state of seismic geophone.

17. The quality of field seismic data acquisition depends on correct operation of geophone in some way.

18. The acquisition system obtains the geological information through the geophone in seism prospecting.

18. try its best to gather and build good sentences.

19. As a specialized measurement appliance of physical exploration for petroleum, geophone tester involves multiple physical magnitudes and technical parameter testing functions.

20. Finally, the paper gave the guide suggestions for SVSM geophone usage.