Graham Field 14423-8, 14423-2 Appendix C, Overall Sensitivity, Overall Sensitivity 2 MHz Probe

12 APPENDIX C, OVERALL SENSITIVITY

Overall Sensitivity (2 MHz Probe)

Diameter	Distance	Reflection		Two-way Attenuation B=∑Ba+Bw
of	(d)	Loss A
Target	(mm)	(d)
						∑Ba			Bw	B
Reflector
(mm)				(T:mm			Ba:dB)		(dB)	(dB)
1.58	50	45.7	T		20	4.8	4.0	-	0	57.6
A=45.7dB
			Ba		40	9.6	8.0	-
@2 MHz
	75	45.7	T		20	4.8	3.4	-	0	56.4
			Ba		40	9.6	6.8	-
	100	45.7	T		20	4.8	3.4	-	0	56.4
			Ba		40	9.6	6.8	-
	200	45.7	T		20	4.8	-	-	0	49.6
			Ba		40	9.6	-	-
2.38	50	43.2	T		20	4.8	3.4	2.2	0	60.8
A=43.2dB
			Ba		40	9.6	6.8	4.4
@2 MHz
	75	43.2	T		20	4.8	3.4	1	0	58.4
			Ba		40	9.6	6.8	2
	100	43.2	T		20	4.8	3.4	-	0	56.4
			Ba		40	9.6	6.8	-
	200	43.2	T		20	4.8	1	-	0	51.6
			Ba		40	9.6	2	-
Doppler	333
Frequency
(Hz)

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