A speech recognition device is configured to increase usability by retrying speech recognition without returning to a previous operation or a re-input of speech when a user’s speech is misrecognized. Each of the plurality of the external electrodes comprises an internal flange expanded in a direction from the external periphery of the p-type thermoelectric member toward the internal periphery of the p-type thermoelectric member. The addition of PFA to IBA has been found to facilitate production of lightweight and normal weight aggregates. Echo signals of the consecutive beams are used to determine an elevation angle estimate for the target.