Vehicle pass-by and community noise monitor
First Claim
1. A sound level detection system, which comprises(a) sound level measuring means generating an electrical output corresponding to the measured sound level,(b) measured sound information means associated with said sound level measuring means,(c) circuit means interconnecting said information means and said sound level measuring means,(d) said circuit means being operative in a plurality of conducting states, including at least a first conducting state acting to transmit said output to said information means, and a second conducting state acting to continuously, electrically store the maximum output generated by said sound level measuring means when said circuit means is operative in said second conducting state and to transmit said maximum output to said information means, and(e) said circuit means comprising an electrical conducting means and an electrical storage means connected thereto,(f) said electrical conducting means and said electrical storage means being operative together when said circuit means is in said second conducting state whereby said storage means continuously stores the maximum output generated by said sound level measuring means,(g) a comparator means for comparing a predetermined threshold value with the output of said sound level measuring means and being operative when said output exceeds said predetermined threshold value to switch said circuit means from said first conducting state to said second conducting state whereby said maximum output generated by said sound level measuring means and stored in said electrical storage means during the time said circuit means is operating in said second conducting state is continually transmitted to said sound information means.
0 Assignments
0 Petitions
Accused Products
Abstract
The disclosure is related to a sound level meter including unique features for measuring, storing and displaying a maximum sound level generated by a passing motor vehicle or the like. The meter operates as an ordinary sound level meter until a predetermined threshold noise level is reached, at which time a novel circuit continuously detects the incoming sound level and electrically stores the maximum value detected. A comparison means compares the incoming sound level with the maximum stored level. When the incoming sound level decreases by a predetermined amount below the maximum stored value, a circuit is energized to lock the maximum value detected in a memory device. Additional means are provided to visually display the stored value.
23 Citations
12 Claims
-
1. A sound level detection system, which comprises
(a) sound level measuring means generating an electrical output corresponding to the measured sound level, (b) measured sound information means associated with said sound level measuring means, (c) circuit means interconnecting said information means and said sound level measuring means, (d) said circuit means being operative in a plurality of conducting states, including at least a first conducting state acting to transmit said output to said information means, and a second conducting state acting to continuously, electrically store the maximum output generated by said sound level measuring means when said circuit means is operative in said second conducting state and to transmit said maximum output to said information means, and (e) said circuit means comprising an electrical conducting means and an electrical storage means connected thereto, (f) said electrical conducting means and said electrical storage means being operative together when said circuit means is in said second conducting state whereby said storage means continuously stores the maximum output generated by said sound level measuring means, (g) a comparator means for comparing a predetermined threshold value with the output of said sound level measuring means and being operative when said output exceeds said predetermined threshold value to switch said circuit means from said first conducting state to said second conducting state whereby said maximum output generated by said sound level measuring means and stored in said electrical storage means during the time said circuit means is operating in said second conducting state is continually transmitted to said sound information means.
-
3. A sound level detection system, which comprises
(a) sound level measuring means providing an electrical output corresponding to the measured sound level, (b) measured sound information means associated with said sound level measuring means, (c) circuit means interconnecting said information means and said sound level measuring means, (d) said circuit means being operative in a plurality of conducting states, including at least a first conducting state acting to transmit said output to said information means, and a second conducting state acting to continuously, electrically store the maximum output from said sound level measuring means and to transmit said maximum output to said information means, (e) a comparator means for comparing a predetermined threshold value with the output of said sound level measuring means and being operative when said output exceeds said predetermined threshold value to switch said circuit means from said first conducting state to said second conducting state whereby the maximum sound level above the predetermined threshold is continually transmitted to said sound information means, and (f) a second comparator means for comparing said output from the sound level measuring means with said maximum stored output and being operative when said output is more than a predetermined amount below said maximum stored output to lock said maximum stored output value in said information means.
-
11. A sound level detection system which comprises
(a) sound level measuring means providing an electrical output corresponding to the measured sound level, (b) sound information means associated with said sound level measuring means, (c) electrical storage means associated with said sound information means, (d) circuit means interconnecting said sound level measuring means, said sound information means and said electrical storage means, (e) said circuit means being operative in a plurality of conducting states including at least a first conducting state acting to transmit said output to said information means and a second conducting state being operative to activate said electrical storage means to store the maximum output from said sound level measuring means, and (f) a first comparator means for comparing a predetermined threshold value with the output of said sound level measuring means and being operative when said output exceeds said predetermined threshold value to switch said interconnecting circuit means from said first conducting state to said second conducting state, (g) said electrical storage means being operative to transmit the stored maximum output to said sound information means, (h) a second comparator means for comparing the stored maximum output with the output of said sound level measuring means and being operative when the value of said output is a predetermined portion of the value of said stored maximum output to hold said stored maximum output in said sound information means.
-
12. A sound level detection system, which comprises:
-
(a) sound level measuring means providing an electrical output corresponding to the measured sound level, (b) measured sound information means associated with said sound level measuring means, (c) circuit means interconnecting said information means and said sound level measuring means, (d) said circuit means being operative in a plurality of conducting states, including at least a first conducting state acting to transmit said output to said information means, and a second conducting state acting to continuously, electrically store the maximum output from said sound level measuring means and to transmit said maximum output to said information means, (e) a comparator means for comparing a predetermined threshold value with the output of said sound level measuring means and being operative when said output exceeds said predetermined threshold value to switch said circuit means from said first conducting state to said second conducting state whereby the maximum sound level above the predetermined threshold is continually transmitted to said sound information means, and (f) means to generate said predetermined threshold value comprising a voltage divider element including several output contacts, each providing a different threshold value voltage, (g) said comparator means being selectively electrically connected to one of said output contacts whereby the output of said sound level measuring means may be compared to a pre-selected threshold value.
-
Specification