»Acoustical Simulation and Predictions
MEZZOLaB is an independent acoustics laboratory providing material testing for both in-house research projects and for audio, acoustics, and construction industries. Real-size room acoustics measurements and building acoustics field tests for measuring airborne and impact noise transmission are held with high end acoustical test systems. In addition to hardware systems, the highly specialized software tools licensed to MEZZO aid designers in the prediction of acoustical quantifiers even in design phase of ongoing projects.
How the proposed design in shape of a building or an interior hall would sound like necessitates a way of prediction, modification and control of sound. Computer based acoustical simulation and estimation tools licensed to MEZZO are listed as follows;
» ODEON v.12.15

ODEON Room Acoustics Software version 12.15 is adapted as major acoustical simulation software by MEZZO in estimating room acoustical parameters such as reverberation time, early decay time, clarity, definition, lateral fraction, strength, sound pressure level and sound transmission index. From undersized to large scale projects in the field of consultancy ranging from theatres, multipurpose halls, operas to offices, public buildings and subway stations it is crucial for MEZZO Studio to take the necessary actions at the design phase considering room acoustics and noise control issues.

» BASTIAN v.2.3

MEZZO consults BASTIAN in sound transmission predictions between rooms within buildings and between outside and inside environments. BASTIAN is based on part 1 and 3 of the European Standard series EN 12354 and adopted by the majority of the European countries including Turkey as part of their national standards. These calculation procedures form the common basis for the prognosis of sound insulation of buildings.

» INSUL v.7.013

Airborne sound insulation of walls, partitions and floor or ceiling assemblies separating dwelling units from each other or from public should satisfy certain sound transmission class (STC/Rw) limits. Floor or ceiling assemblies between dwelling units or between a dwelling unit and a public or service area within the structure shall also have a specific impact insulation class (IIC) rating. INSUL aids MEZZO designers to predict airborne sound isolation and structure borne sound isolation characteristics of building elements, and assist accordingly to devise improved details and material compositions. INSUL also provides STC information to BASTIAN for tested material compositions or building elements.

» ZORBA v.2.8

Prediction of sound absorption properties of slatted and perforated absorbers is important as they are frequently used to control the acoustics of rooms. Especially in design phase of sound absorbent materials in aim of achieving specific acoustic characters, predictions are highly practical and time saving. In that respect ZORBA calculates the acoustic impedance, the normal incidence absorption coefficients and within certain limitations the random incidence absorption coefficients of specific materials and systems.


Modes in small rooms often lead to extended sound decays and uneven frequency responses. In critical listening spaces, this causes unwanted coloration effects that can be detrimental to the sound quality. The problem arises at low frequencies because of the relatively low modal density. The Room Sizer model provides inherent weighting of axial, tangential and oblique modes for a specific room by numerical optimization method and assists MEZZO designers in estimating the best dimensions of a room for minimum coloration effects of modes.