Question: According to tradition of the historic church St. Mary-le-Bow, the city dweller must be born within earshot of what?

Context paragraphs:
St. Gumbertus, Ansbach: The church St. Gumbertus is one of the central city churches of Ansbach, Bavaria, together with the neighboring St. Johannis.  Located in the "Altstad"t (old town) of Ansbach, St. Gumbertus, now a Lutheran church, was originally the church of a monastery that was founded by St. Gumbert around 750.  Today it serves as a venue for concerts of the music festival Bachwoche Ansbach.  The church contains the oldest structures in Ansbach and is considered Ansbach's city symbol.

St. Luke's Church (Smithfield, Virginia): St. Luke's Church, also known as Old Brick Church, or Newport Parish Church, is a historic church building, located in the unincorporated community of Benns Church, near Smithfield in Isle of Wight County, Virginia, United States.  It is the oldest church in Virginia and oldest church in British North America of brick construction.  According to local tradition the structure was built in 1632, but other evidence points to a date of 1682; see Dating controversy.

Callicoon Methodist Church and Parsonage: Callicoon Methodist Church and Parsonage is a historic Methodist church on Church St. in Callicoon, Sullivan County, New York.  The church was built in 1871 and the parsonage in 1889.  The church is a three-bay vernacular frame building with a central steeple tower.  The parsonage is a 2-story, three-by-two-bay, cross-gabled wood-frame building sided with white asbestos shingles.

Conington, Huntingdonshire: Conington is a village and civil parish in Cambridgeshire, England.  Conington lies approximately 10 km south of Peterborough and 3 km north of Sawtry, within earshot of Ermine Street, now called the Great North Road.  Conington is situated within Huntingdonshire which is a non-metropolitan district of Cambridgeshire as well as being a historic county of England.

Cane River: Cane River ("Rivière aux Cannes") is a 30 mi river formed from a portion of the Red River that is located in Natchitoches Parish, Louisiana.  In the 19th and 20th centuries, it has been best known as the site of a historic "Creole de couleur" (multiracial) culture that has centers upon the National Historic Landmark Melrose Plantation and nearby St. Augustine Church St. Augustine Parish (Isle Brevelle) Church.

Alston, Suffolk: Alston was a medieval parish in the county of Suffolk.  Without enough people to ensure its survival (it was a long trek on foot for a priest in the days before cars), the parish was consolidated with that of Trimley St Martin as early as 1362, according to Blatchly in the 1975 revision of the 1937 book "Suffolk Churches and Their Treasures" by diocesan architect Henry Munro Cautley (1875-1959).  The group of houses now called Trimley Street was in the parish of Alston.  The parish included the still-surviving Grimston Hall, as well as the church St. John the Baptist, which was demolished before the Reformation.  At the end of Trimley Street today there are two cottages to the right, and in the field to the left, the church St. John the Baptist stood.

Cockney: The term cockney has had several distinct geographical, social, and linguistic associations.  Originally a pejorative term applied to all city-dwellers, it was eventually restricted to Londoners and particularly to "Bow-bell Cockneys": those born within earshot of Bow Bells, the bells of St Mary-le-Bow in the Cheapside district of the City of London.  It eventually came to be used to refer to those in London's East End, or to all working-class Londoners generally.

St. Jacobi (Münster): The church St. Jacobi was located south of Münster Cathedral in the Domplatz in Münster and served as the parish church for the laity who lived within the Domimmunität.  The church is first mentioned in 1262.  The building was heavily damaged during the Münster Rebellion, but was rebuilt after 1535.  During the French period, the building was demolished in 1812 after the rejection of an alternative proposal to demolish the cathedral and expand St. Jacobi.  The bells of St. Jacobi continue in use at in .

London tornado of 1091: The London Tornado of 1091 is reckoned by modern assessment of the reports as possibly a T8 tornado (roughly equal to an F4 tornado) which occurred in London in the Kingdom of England and was the earliest reported tornado, occurring on Friday, 17 October 1091.  The wooden London Bridge was demolished, and the church of St. Mary-le-Bow in the city of London was badly damaged; four rafters 26 ft long were driven into the ground with such force that only 4 ft protruded above the surface.  Other churches in the area were demolished, as were over 600 (mostly wooden) houses.  For all the damage inflicted, the tornado claimed just two victims from a population of about 18,000.

St Mary-le-Bow: St Mary-le-Bow is an historic church rebuilt after the Great Fire of 1666 by Sir Christopher Wren in the City of London on the main east–west thoroughfare, Cheapside.  According to tradition a true Cockney must be born within earshot of the sound of Bow Bells (which refers to this church's bells rather than St Mary and Holy Trinity, Bow Road, in Bow, an outlying village until the 19th century).

Supporting paragraphs: St Mary-le-Bow Cockney
Answer: Bow Bells