text: the following term is defined for use in this specification , including the appended claims : the term “ call ,” and its inflected forms , is defined as an interactive communication involving one or more telecommunications terminal ( e . g ., “ phone ”, etc .) users , who are also known as “ parties ” to the call . an audio call is featured in the illustrative embodiment of the present invention , in which audio signals originated by at least one of the call parties is transmitted to another call party . as those who are skilled in the art will appreciate , in some alternative embodiments , a call might comprise video signals . furthermore , a call can involve one or more human call parties or one or more automated devices , alone or in combination with each other . fig1 depicts telecommunications system 100 , which features a “ call center ,” in accordance with the illustrative embodiment of the present invention . a call center is sometimes referred to as a “ contact center .” telecommunications system 100 comprises calling telecommunications terminal 101 ; telecommunications network 102 ; call center data - processing system 103 ; and enterprise telecommunications terminals 104 - 1 through 104 - n , wherein n is a positive integer , the depicted elements being interconnected as shown . calling telecommunications terminal 101 is a device that is capable of originating or receiving calls , or both . for example , terminal 101 can be one of a telephone , a notebook computer , a personal digital assistant ( pda ), and so forth . terminal 101 handles calls via telecommunications network 102 and is capable of exchanging audio and call processing - related signals with one or more other devices , such as terminal 104 - n through data - processing system 103 . to this end , terminal 101 exchanges one or more of internet protocol ( ip ) data packets , session initiation protocol ( sip ) messages , voice over ip ( voip ) traffic , and stream - related messages ( e . g ., real time streaming protocol [ rtsp ] messages , etc .) with network 102 , as well as system 103 and terminal 104 - n . telecommunications network 102 is a network such as the public switched telephone network [ pstn ], the internet , etc . that carries calls to and from telecommunications terminal 101 , call center data - processing system 103 , and other devices not appearing in fig1 . a call might be a conventional voice telephony call , a video - based call , a text - based instant messaging ( im ) session , a voice over internet protocol ( voip ) call , and so forth . call center data - processing system 103 provides the functionality of a private - branch exchange with an automatic call distributor ( acd ), in that it receives incoming calls from telecommunications network 102 and directs the calls to one of a plurality of telecommunications terminals within the enterprise ( i . e ., enterprise terminals 104 - 1 through 104 - n ) or to another function such as interactive voice response ( ivr ), depending on how system 103 is programmed or configured . for example , in an enterprise call center , system 103 might comprise logic for routing calls to call agents &# 39 ; terminals based on criteria such as how busy various call agents have been in a recent time interval , the telephone number called , and so forth . in handling incoming calls , system 103 is capable of exchanging internet protocol ( ip ) data packets , session initiation protocol ( sip ) messages , voice over ip ( voip ) traffic , and stream - related messages ( e . g ., real time streaming protocol [ rtsp ] messages , etc .) with calling terminals such as terminal 101 and enterprise terminals 104 - 1 through 104 - n . in some embodiments , system 103 might be programmed or configured so that an incoming call is initially routed to an ivr function , and , based on caller input , is subsequently redirected back to the private - branch exchange function of system 103 for routing to an appropriate telecommunications terminal within the enterprise ( i . e ., one of terminals 104 - 1 through 104 - n ). possibly , system 103 might queue each incoming call if all agents are busy , until the queued call can be routed to an available agent at one of enterprise terminals 104 - 1 through 104 - n . system 103 also receives audio signals from enterprise terminals 104 - 1 through 104 - n , and transmits the audio signals on to telecommunications network 102 for delivery to a caller &# 39 ; s terminal . the salient components of system 103 that enable communication between a calling terminal ( e . g ., terminal 101 , etc .) and enterprise terminal 104 - n are described below and with respect to fig2 . system 103 also performs the tasks of the illustrative embodiment , the salient tasks being described below and with respect to fig3 . enterprise telecommunications terminal 104 - n , where n has a value between 1 and n , is a device that is capable of originating or receiving calls , or both . in accordance with the illustrative embodiment , terminal 104 - n is a workstation softphone at a call center ; in some alternative embodiments , however , terminal 104 - n can be one of a telephone , a notebook computer , a personal digital assistant ( pda ), and so forth . as those who are skilled in the art will appreciate , terminals 104 - 1 through 104 - n can be different from one another . terminal 104 - n handles calls via system 103 and is capable of exchanging audio and call processing - related signals with one or more other devices , such as terminal 101 via network 102 . to this end , terminal 104 - n exchanges one or more of internet protocol ( ip ) data packets , session initiation protocol ( sip ) messages , voice over ip ( voip ) traffic , and stream - related messages ( e . g ., real time streaming protocol [ rtsp ] messages , etc .) with system 103 . as will be appreciated by those skilled in the art , some embodiments of the present invention might feature an architecture for telecommunications system 100 that is different than that of the illustrative embodiment . for example , in some embodiments , the interactive voice response ( ivr ) system functionality of system 103 might be provided by a separate server . in some other embodiments , the ivr functionality might not even be present . it will be clear to those skilled in the art , after reading this specification , how to make and use such alternative architectures . fig2 depicts the salient components of data - processing system 103 , in accordance with the illustrative embodiment of the present invention . system 103 comprises network interface 201 , processor 202 , and memory 203 , interconnected as shown . it will be clear to those skilled in the art , after reading this disclosure , how to make and use alternative embodiments of the present invention in which system 103 comprises any subcombination of the components listed above . network interface 201 comprises the circuitry that enables system 103 to receive signals from and transmit signals to any terminal such as terminals 101 ( via network 102 ) and 104 - n in well - known fashion . processor 202 is a general - purpose processor that is capable of receiving information from and transmitting information to network interface 201 , of executing instructions stored in memory 203 including those that correspond to the tasks of the illustrative embodiment , and of reading data from and writing data into memory 203 . in some alternative embodiments of the present invention , processor 202 might be a special - purpose processor . memory 203 stores the instructions and data used by processor 202 , in well - known fashion . memory 203 can be any combination of dynamic random - access memory ( ram ), flash memory , disk drive memory , and so forth . fig3 depicts a flowchart of the salient tasks performed by call center data - processing system 103 , in accordance with the illustrative embodiment of the present invention . as those who are skilled in the art will appreciate , some or all of the tasks depicted in fig3 can be performed simultaneously or in a different order than that depicted . in accordance with the illustrative embodiment , call center data - processing system 103 performs the depicted tasks , which are described below . however , it will be clear to those skilled in the art , after reading this specification , how to make and use alternative embodiments of the present invention , in which a data - processing system other than system 103 performs some or all of the described tasks , such as a separate automatic call distributor ( acd ) system . in order to understand the salient tasks of the illustrative embodiment , it is important to understand the spatial relationship among call agents in determining how to assign a call agent to each incoming call . fig4 depicts an overhead view of call center 400 , in which call agents are stationed at various locations relative to one another . in the illustrative call - center layout that is depicted , there are four clusters of workstation areas , clusters 401 - 1 through 401 - 4 . each of enterprise terminals 104 - 1 through 104 - n is associated with a different call agent who is located at a different workstation area , as depicted in fig4 . for example , agent 1 of a given cluster sits at the position at the upper left - hand corner of the cluster , agent 2 sits next to agent 1 , and so on , while agent 7 ( of a twelve - agent cluster ) sits in front of agent 1 , agent 8 sits in front of agent 2 , and so on . across clusters , agent 7 of a first cluster ( e . g ., cluster 401 - 1 ) sits directly behind agent 1 of a second , adjacent cluster ( e . g ., cluster 401 - 2 ); agent 8 of the first cluster sits directly behind agent 2 of the second cluster ; and so forth . although four elongated clusters of workstation areas are depicted , it will be clear to those skilled in the art how to make and use alternative embodiments of the present invention , in which a different number of clusters , a different number of workstation areas in each cluster , a different physical arrangement within a cluster ( e . g ., circular orientation , etc . ), or a different combination of clusters applies . the call agents that are located at call center 400 are continually receiving incoming telephone calls from calling terminals such as terminal 101 . as a result , acoustic noise is present at one or more workstation areas throughout call center 400 . depending on various factors , the acoustic noise will vary across time and space . such factors include the acoustics present at call center 400 , the speech characteristics of the call agents , and how incoming calls are assigned to call agents . although call - center acoustics and agents &# 39 ; speech characteristics might be changeable to some extent , the illustrative embodiment of the present invention concerns the assignment of call agents to the incoming calls , and in particular , in respect of the acoustic noise present throughout the call center . at task 301 , system 103 receives an incoming call from calling terminal 101 . as those who are skilled in the art will appreciate , system 103 is capable of continually receiving incoming calls from other calling terminals as well . at task 302 , system 103 identifies a plurality of call agents who are available to handle the incoming call from calling terminal 101 . in some embodiments , the call agents that are included in the plurality are not those who are merely available , but are those agents who are the best available agents to respond to the given incoming call . to determine the best agent or agents , system 103 can retrieve and review additional data ( e . g ., via the interactive voice response function , the caller &# 39 ; s caller id , etc .) to find out the reason for the call . in some embodiments , the plurality of call agents identified by system 103 also includes one or more call agents who are presently unavailable but who will become available within a predetermined time interval . as those who are skilled in the art will appreciate , techniques exist for determining when an unavailable call agent will become available for an incoming call . the unavailable agents who are included in the plurality might include those agents who previously have been associated with a favorable level of acoustic noise , or who might be associated with a favorable level pending a measurement . at task 303 , system 103 determines the acoustic noise that is present in the vicinity of each call agent in the plurality . as those who are skilled in the art will appreciate , after reading this specification , various methods can be used for determining the acoustic noise , either individually or in combination with one another . for example , in a first method of determining the acoustic noise present , system 103 measures acoustic noise that is present at one or more workstation areas . system 103 can direct the telephone and / or the computer within each workstation area to activate its microphone , listen for acoustic signals when the associated call agent is idle , and report one or more measurements back to system 103 . in some embodiments of the first method , system 103 accumulates multiple measurements of acoustic noise , wherein at least one of the multiple measurements was made prior to receiving the incoming call . as another example , in a second method of determining the acoustic noise present , system 103 infers a level of acoustic noise from the location of each available call agent relative to the locations of other call agents who are presently engaged in calls . in this example , if several call agents are available to handle an incoming call , namely agents at clusters 401 - 1 and 401 - 2 in fig4 , and most of the agents already engaged in calls are sitting at clusters 401 - 3 and 401 - 4 , then the method of inferring the acoustic noise would tend to assign , to the incoming call , one of the agents sitting at the left side of cluster 401 - 1 ( i . e ., one of the agents furthest away from the agents already engaged in calls ). at task 304 , if an acceptable candidate call agent with favorable acoustic noise characteristics is available to handle the incoming call , task execution proceeds to task 308 . otherwise , task execution proceeds to task 305 . in some embodiments , the assigning described below and with respect to task 308 will occur when the acoustic noise is less than a first , predetermined threshold , while in some alternative embodiments , the assigning will occur when the acoustic noise is greater than a second , predetermined threshold . the first and / or second predetermined threshold , as well as the decision to select an agent with a lower or a high background noise level , can be based on one or more attributes of the incoming call . for example , if the purpose of the incoming call is to obtain technical support , then a minimal amount of background noise is probably desired . in some embodiments , the call agent candidate who is associated with the least amount of acoustic noise can be selected . in contrast , if the purpose of the incoming call is to pledge money for a telethon , then an increased noise level might be desired to create a sales “ buzz ” on the caller &# 39 ; s part . at task 305 , if no agent who is associated with a favorable noise level is available , system 103 queues the incoming call in order for the incoming call to be assigned a call agent at a future time . at task 306 , in order to update the acoustic noise data , system 103 determines the acoustic noise that is present in the vicinity of each available ( or soon - to - be - available ) call agent , as performed at task 303 . at task 307 , if an agent with favorable acoustic noise characteristics becomes available to handle the incoming call or if the predetermined time interval lapses , task execution proceeds to task 308 . otherwise , task execution proceeds to task 306 . at task 308 , system 103 assigns a call agent to the incoming call . in accordance with the illustrative embodiment , the assignment is based on the acoustic noise , in particular on an available call agent being associated with favorable acoustic noise , as described earlier . system 103 performs the tasks described with respect to fig3 on additional , incoming calls as they arrive at the call center . it is to be understood that the disclosure teaches just one example of the illustrative embodiment and that many variations of the invention can easily be devised by those skilled in the art after reading this disclosure and that the scope of the present invention is to be determined by the following claims .