Management system with acoustical measurement for monitoring noise levels

• US 9,247,367 B2
• Filed: 10/31/2012
• Issued: 01/26/2016
• Est. Priority Date: 10/31/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Nobile, Matthew A., Rosato, Sal M.
• Primary Examiner(s): Goins, Davetta W
• Assistant Examiner(s): Sellers, Daniel
• Application Number:
  US13/664,851
• Publication Number:
  US 20140119547A1
• Time in Patent Office: 1,182 Days
• Field of Search: 381/56, 381/58, 381/72, 381/111, 381/122, 340/539.26
• US Class Current: 1/1
• CPC Class Codes: G10K 2210/12 Rooms, e.g. ANC inside a room, office, concert hall or automobile cabin
• CPC Class Codes: H04R 2201/021 Transducers or their casings adapted for mounting in or to a wall or ceiling
• CPC Class Codes: H04R 29/005 Microphone arrays
• CPC Class Codes: H04R 29/008 Visual indication of individual signal levels visual indication of stereophonic sound image H04S7/40

Abstract

A system is provided and includes a plurality of acoustic devices disposed in locations arrayed throughout a defined space, each one of the plurality of acoustic devices being receptive of acoustical attributes such as sound or noise levels generated in the defined space and configured to issue signals reflective of the generated acoustical attributes and an acoustic data unit disposed in signal communication with each of the plurality of acoustic devices. The acoustic data unit is receptive of the signals issued from the plurality of acoustic devices and configured to convert the signals into digital acoustic data and to output the digital acoustic data in a serialized format compatible with a network protocol.

Claims

1. A method of measuring acoustics in a defined space, comprising:

defining an array of concealed locations throughout the defined space;

concealing a plurality of acoustic devices in the defined concealed locations by disposing the acoustic devices above and at a distance from an upper surface of a ceiling having material through which acoustics pass to reach the acoustic devices;

receiving, at an acoustic data unit, acoustic data from the plurality of acoustic devices;

converting the acoustic data by back-propagating the acoustic data to a level associated with a different point in space from where the corresponding acoustic device is located and digitizing the back-propagated acoustic data; and

outputting, from the acoustic data unit, the converted acoustic data in a serialized format that is compatible with a network protocol.

2. The method according to claim 1, further comprising coupling the acoustic data unit to a process control system operating in accordance with the network protocol such that the process control system is receptive of the converted acoustic data in the serialized format.

3. The method according to claim 1, further comprising:

multiplexing, at the acoustic data unit, the acoustic data from the plurality of acoustic devices;

converting analog signals from the plurality of acoustic devices to digital signals; and

organizing the digital signals into the serialized format.

4. The method according to claim 3, wherein the converting comprises:

weighting the analog signal from each acoustic device over a frequency range thereof;

extracting a mean-square level for each weighted analog signal;

converting the mean-square level to logarithmic values;

digitizing the logarithmic values.

5. A method of measuring acoustics in a defined space, comprising:

concealing acoustic devices above and at a distance from an upper surface of a ceiling in the defined space such that acoustics pass through ceiling material to reach the acoustic devices;

receiving analog acoustic data reflective of the acoustics passing through the ceiling material from each acoustic device;

back-propagating the analog acoustic data for each acoustic device to a level associated with a different point in space from where the corresponding acoustic device is located;

converting the back-propagated, analog acoustic data into digitized data; and

outputting, in a serialized format compatible with a network protocol, the digitized data for each acoustic device in a sequence including, for each acoustic device, the digitized data and an identification of the corresponding acoustic device.