Category Archives: Acoustics

Speaker off axis: constant bandwidth transducers (CBTs)

This blog article is the seventh in a series on speaker directivity and off axis response. This article will consider the off axis response of constant bandwidth transducers (CBTs) and consequences for acoustic design. Previous articles in the series established the theoretical foundation in terms of the psychoacoustic as well as subjective importance of speaker off axis response and different ways to measure speaker directivity. We followed this up with articles that examined the specifics of: Waveguided and non-waveguided forward […]

Speaker off axis: omnidirectional speakers

This blog article is the sixth in a series on speaker directivity and off axis response. This article will consider the off axis response of omidirectional speakers (“omnis”) and consequences for acoustic design. Previous articles in the series established the theoretical foundation in terms of the psychoacoustic as well as subjective importance of speaker off axis response and different ways to measure speaker directivity. We followed this up with articles that examined the specifics of: Waveguided and non-waveguided forward firing […]

Speaker off axis: coaxial speakers

This blog article is the fifth in a series on speaker directivity and off axis response. This article will consider the off axis response of coaxial speakers and consequences for acoustic design. Previous articles in the series established the psychoacoustic as well as subjective importance of speaker off axis response, different ways to measure speaker directivity, the off axis characteristics of waveguided and non-waveguided forward firing cone / dome speakers and the off axis characteristics of constant directivity horn waveguide […]

Speaker off axis: constant directivity horn waveguide speakers

This blog article is the fourth in a series on speaker directivity and off axis response. This article will consider the off axis response of constant directivity speakers and consequences for acoustic design. Previous articles in the series established the psychoacoustic as well as subjective importance of speaker off axis response, different ways to measure speaker directivity and the off axis characteristics of waveguided and non-waveguided forward firing cone / dome speakers. Many speakers are labeled “constant directivity” because the […]

Speaker off axis response: forward firing cone / dome speakers

This blog article is the third in a series on speaker directivity and off axis response. Previous articles in the series established the psychoacoustic as well as subjective importance of speaker off axis response and looked at different ways to measure speaker directivity.¬†¬†Today we will look at the directivity characteristics of forward firing cone / dome speakers. This category of speaker design represents the vast majority of speakers manufactured today and what most people own. These speakers are comprised of […]

Speaker off axis response: psychoacoustic and subjective importance

This article focuses on why speaker directivity and off axis response is important to the quality of sound reproduction that we get in our home theaters, two channel listening rooms and project studios. It is the second in a mini-series of articles – the first article covered the theory of speaker directivity and different ways to measure it. We will be following up this blog post in the coming weeks with further posts looking at the directivity characteristics of different […]

Speaker directivity / off axis response: theory and measurement techniques

This blog article is the first in a mini-series about speaker directivity or off axis frequency response. For us the two most important things in determining sound quality in a home theater or stereo are the speaker and the room. Above the room’s transition frequency the speaker’s directivity dominates what we hear and so it is an important topic to understand. Any acoustic treatment scheme for early reflection and reverberation control should be designed from the speaker out, by considering […]

Multiple Subwoofer Case Study: Acoustic Frontiers Demo Room

This article is a case study of how low frequency modeling tools can be used to ensure consistent, relatively flat seat-to-seat bass response in a home theater. This particular case study focuses on the Acoustic Frontiers demo room and shows how we determined the optimal number and placement of multiple subwoofers using these tools.   Relevant Home Theater Design Performance Requirements There are two performance requirements that are important to this discussion: Consistent seat-to-seat bass response. Consistent bass response is […]

Five reasons to love DEQX’s new PreMATE processor

The PreMATE is DEQX’s newest speaker / room correction processor and digital crossover. It offers: Speaker correction – measure and correct the frequency response, group delay and phase anomalies of your loudspeakers using DEQX’s unique linear phase filters Room correction – measure your room and implement up to 10 bands of real time controllable digital parametric EQ with selectable frequency, bandwidth and gain Digital crossover – use the crossover functionality to add subwoofer(s) to your existing speakers with selectable crossover […]

New acoustic treatment options from Vicoustic!

Acoustic Frontiers is very happy to announce the immediate availability of Vicoustic‘s lineup in the USA! Vicoustic manufacture a wide range of acoustic treatment including absorbers, diffusors and combination absorber / diffusors. A lot of their products include real wood with a number of different finishes. We think they look great and could easily work in a multi-purpose family room as well as adding some architectural interest to a dedicated listening or home theater space. Vicoustic’s diffusor line up is […]