Clarinet Mouthpiece Rectangular Bore for Tonal Clarity

Solution Overview

Problem

Woodwind instruments, particularly clarinets, experience a noticeable change in tonality between upper and lower registers, resulting in unclear throat tones due to disparities in cavity dimensions between the mouthpiece and instrument bore, leading to a lack of harmonic cooperation.

Innovation Solution

The clarinet mouthpiece and barrel system is redesigned with enlarged cavity dimensions and non-circular bore geometry, specifically a rectangular cross-section, to accommodate a larger reed and generate transverse harmonics that align with upper register wavelengths, improving tonal clarity and evenness across registers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the mouthpiece cavity dimensions are enlarged to improve upper register tone quality, then the tone becomes more full and substantive, but the reed size must be increased which complicates the instrument configuration

Engineering Contradiction:

Improvetone qualityVSAvoidreed size

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent changes the physical parameters of the mouthpiece cavity by enlarging its dimensions and altering its geometry. Specifically, the cavity is enlarged to accommodate a larger reed (such as an alto saxophone reed instead of a conventional clarinet reed), which directly improves the tone quality in the upper register by providing a bigger, more substantive sound with greater tonal dimension.

Inventive Principle:

Principle #35Parameter changes

2Illumination intensity

If the bore geometry is changed from circular to non-circular to generate transverse harmonics, then the tonal clarity of upper register notes is improved, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvetonal clarityVSAvoidbore geometry

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies asymmetry by changing the bore geometry from a conventional circular cross-section to a non-circular cross-section. This asymmetric shape is specifically designed to generate transverse oscillations that produce harmonics related to the wavelengths of notes in the upper register, thereby improving the tonal clarity of notes that are typically dull sounding.

Inventive Principle:

Principle #4Asymmetry

3Productivity

If the mouthpiece cavity is enlarged to improve harmonic density, then the response and overall tone are significantly improved, but the scale line becomes more complex to manufacture

Engineering Contradiction:

ImproveresponseVSAvoidscale line

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent changes the physical parameters of the mouthpiece cavity by enlarging its dimensions and altering its geometry. Specifically, the cavity is enlarged to accommodate a larger reed (such as an alto saxophone reed instead of a conventional clarinet reed), which directly improves the tone quality in the upper register by providing a bigger, more substantive sound with greater tonal dimension.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies asymmetry by changing the bore geometry from a conventional circular cross-section to a non-circular cross-section. This asymmetric shape is specifically designed to generate transverse oscillations that produce harmonics related to the wavelengths of notes in the upper register, thereby improving the tonal clarity of notes that are typically dull sounding.

Inventive Principle:

Principle #4Asymmetry

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design enhances the overall tone quality, making upper notes more full and substantive, and improves response by increasing harmonic density, resulting in a more even scale line and bigger tone.

Implementation Method 1

by revising the bore geometry of both the mouthpiece and the barrel to be a shape other than circular, for example, rectangular, transverse oscillations are generated along a portion of the entire bore of the instrument that are more harmonically related to notes that are typically dull sounding notes

Methodology Applied

Scientific EffectTransverse oscillations: Vibration

Implementation Method 2

Woodwind musical instruments, e.g., saxophones and clarinets, and other devices such as bird calls, utilize the vibration of a reed in response to a flow of air to generate a tone

Methodology Applied

Scientific EffectReed vibration: Vibration

Data Source

PatentUS8841529B2Clarinet mouthpiece and barrel system

Publication Date: 2014.09.23 ROVNER MC LLC

AI summary

A clarinet mouthpiece and tuning barrel system includes a mouthpiece with a central mouthpiece bore passing through the mouthpiece from a tone chamber to a rear portion of the mouthpiece opposite the tone chamber. The mouthpiece bore has a rectangular cross-sectional geometry extending along an entire length of the mouthpiece bore. This rectangular geometry includes two pairs of opposing parallel sides. Each pair of opposing sides is separated by a unique distance such that a ratio of unique distances for the two pairs of opposing parallel sides is ⅝. Also included is a tuning barrel attached to the rear portion of the mouthpiece. This barrel has a central barrel bore in communication with the mouthpiece bore that passes completely through the barrel. The barrel bore has an identical rectangular cross-sectional geometry to the mouthpiece bore cross-sectional geometry along an entire length of the barrel bore.