An independent acoustic consultancy. Room acoustics, sound insulation and mechanical services noise — criteria set at concept stage, specified through design, and verified by measurement before handover.
Services
Each one is measured against a published standard, so the target is written down at the start and verified at the end.
ISO 3382-1
Reverberation time, speech clarity and background noise targets for auditoria, classrooms, prayer halls and open-plan offices. Modelling at concept stage, finishes schedules at detail stage.
ISO 717-1 · ISO 16283
Airborne and impact performance for partitions, floors and facades. Build-ups specified to meet a stated DnT,w or R'w, with junction detailing that survives the site.
ASHRAE · NC / RC
In-duct attenuation, breakout, regenerated noise and plant isolation. Attenuator sizing, isolator selection and NC verification in occupied spaces.
ISO 1996
Baseline surveys, construction noise assessment and plant breakout to boundary. Measurement, prediction and mitigation against the applicable limits.
Construction stage
Technical review of contractor submittals against the specification: attenuators, isolators, ceiling systems, doors and glazing. Written comments with a clear approve, comment or reject position.
ISO 16283 · ISO 3382-2
On-site verification before handover. Field sound insulation, reverberation time and background noise, reported against the contract acceptance criteria.
Sectors
Acoustic requirements follow the function of the room. A lecture theatre and a hotel guest room fail in completely different ways, and are designed to different numbers.
Classrooms, lecture theatres and libraries, where speech intelligibility drives the criteria.
Consultation privacy, ward noise and plant isolation in continuously occupied buildings.
Guest room insulation, back-of-house separation and noise from late-operating venues.
Open-plan speech privacy, base-build acoustic ratings and tenant fit-out review.
Party wall and floor performance, facade insulation against external noise.
Auditoria, rehearsal and recording spaces where room acoustics are the primary design driver.
Speech intelligibility across large volumes, with reinforcement and finishes designed together.
Galleries, aquaria and exhibition spaces combining heavy plant with quiet public areas.
How a project runs
Most acoustic failures trace back to a substitution approved without review, or a junction detail built differently to the drawing. The stages below exist to catch that.
Acoustic criteria set against the brief and the applicable standards. Adjacency risks flagged while the plan can still change.
Constructions, finishes and services routes specified. Calculations issued alongside the drawings.
Specification written so it can be priced and enforced. Queries answered through the tender period.
Submittal review, technical queries and site inspection. The stage where acoustic design is most often lost.
Field measurement against the acceptance criteria, early enough for non-conformances to be corrected.
Test reports and as-built records issued as part of the closeout documentation.
Capability
Predictions are checked against measurements on the same project, so the numbers issued at design stage are the ones tested at handover.
Measurement
Class 1 sound level meter with octave and third-octave band analysis. Reverberation time to ISO 3382-2 and field sound insulation to ISO 16283, calibrated and traceable.
Prediction
In-duct attenuation, breakout and regenerated noise calculated per ASHRAE, with room correction to a stated NC or RC target.
In-house tools
Purpose-built calculators for room NC assessment and duct-borne noise, so predictions are repeatable across a project rather than rebuilt each time.
Reporting
Octave-band results, receiver-averaged and tabulated against the contract criteria, in a format that closes out on site.
About
AN ECHO is an acoustic consultancy team with more than seven years of experience delivering acoustic design and engineering support across Egypt and the Gulf region.
Our team combines experience across design, technical reviews, construction support and site testing, allowing us to follow acoustic requirements from the early design stages through to implementation and verification.
We work collaboratively with clients, architects, MEP engineers and contractors, delivering practical acoustic solutions in English and Arabic in line with international standards and local requirements.
Contact
A fee proposal usually follows within two working days. Early-stage enquiries are welcome before there is anything to price.